1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac533f096ac9f0fc6841237fa32929fc7e5b974900ba8980ca5fff6020bbe38. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/594840b4-9259-4617-b9f5-49560649fd8e.json and https://artists.proofprofile.net/proofs/artist/594840b4-9259-4617-b9f5-49560649fd8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683767660bc140acd6dae795def7e9a14dbd9733633f75b9f36386dc7876e6a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04befcae9e73fcb940fa304672a84171c273e2412c6fbcb057785c90f1a2782. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97512aac0e198843f678225db6cab8079c20811bf0dd65650eb253f300915030. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf56138ef62e20f0ec9b66aeaaeecf4b5d16376994bdde8de048807a5bda370a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1b979bd55e19b17b490a32fbc4a349a4857c0b2a4475773998dc0dbed5693b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a566bde94dd4dda387a52fdddb73411470efda1184a8475203ab2bcb829911. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403665.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2930cb1073b099b084907de0b22927ead5f6c1f524d799a340f550e09eb40ba8. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbf1a07b73349a71780e9989ed6f5107d0cc938e3a34d829aaa5b6fca44b83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834258da1c0cdbd7bfbe1767a976aeaf4a524cf465ba7b39fd3e0fae41d5466a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe24240527d72753dd535a6faac13338460d25bfe05c58063b3785bd59d03fda. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdf53d350056a7edcdb4022210117ed5a693a84a1b22a55a9b811f986cc33d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe610eb6a9da748fec86ffdd71132b73e24429c447dd1dcddaa40c4518cf05b9e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c3ebe50aa1eb3cc13a79a81cc1f80877c6f5e7311d241943a8bacf33a00025. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6089120de3a81aedece7e023a837684425cde30e66a0ea8b39f5c57af2d177f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3dde5bd231e19adaf59762111bf915fdff80dae9fb0e8394f43fda941dc0f9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df4d4914ebe78a2a96107693f373d65372b1fb154cb6287c4dbb2bda31631c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARC572403729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f3b209a1f64f581ef899f893ce91b4c854e024640cdb4c92ad49046e0e3bb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672205921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f3dfd2b75530fe0b5ede140fe12ad91eecc3f4d33d1f7dec56957e332a3a8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672201721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24218babf02155cfce588b874fbf9039fa57d64f449ed1945dae323e664f0ac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672299121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2693ef8e8d1d23199df6079371452e5ef8fdb35462550a1537673790d3499. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672297601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac798c5664817ad4cae7fe366884054157791ab7351b1cae6044bc82694d4395. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672297831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f28f0f65e1916bec0edf862e9263428138f46e8ce66b9f2593431c70492e1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86cf5bb20f282135a9fd3976df910e963a85569de41ae80d65fbf364085ff67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672289801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d83a4aa074b944449c5fcff99593cea61455b28d8f8d65b08dbf37d84d968b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8195fa30b6ad2d0a626ff1978f392eeeefe137ebc1e5c480dba308bd3c3b7804. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672290801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ddbfe6d640453b704269f473ea83fcda4e94fa2f822aa9924739d12133449. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7763ce32ede57c0b800fe4c7fb6be204dce2b325bc751c1b32d64f66b61ef2b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbbffe834537cd333e86ccfd2078fbb49617986c0e7fa87590e2fb8cb1e904. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd820349029a53f03deb3b66d7e797075d632a0c3ae7572bee6f92f4646c6fa26. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974abc88fbcbb01be0cda386aca157f83fee35988f007b10c66cba5bc220d49f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4ca3ddd49a3c96d160c22a4958ebd614f092c0f532331a9c08f2da546eea1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd3996a7229310b07781e47a8dfc8911a64e5e456b9d855a71ac8ce95716f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb373409498de5c4b5e17c8bd730087d13527ab069c9ed350cd87ad66cbd301e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1d2528d84be8064f028eba29e64eee70daad3db4f0afcb8e9972f64f79b0d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113b4a820e31b8c0feff779d0d8126ccbcdcdd38ec3c2ef73f850b884e92edd5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83169dc6e43b544c3f975902fe1cedf481ee87930144116fa971b47ca56b91e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a3cbc15fa542d4b7bc4a3b6002561e50a5e6f72ef0f15f6146bfbdd0426b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901f2f6102165cc17aa10d8f2c0327df587c4dc683be2c9969c75435fbc80f6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672291401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3536a7ab46f95af48f7053cb655b15ee59173f412ce182b67a1585940e7da479. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA672292801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3fc658555c3750a9d01ece5f5cc02f6a58bb5180852e209b044ee620076510. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA262227653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592797713cf6b418d9f64b7149194f2dfa7c8335b95a559a848049f0fa0044e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA262227654.