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 0x416d0e90613c9030d1299a53a781447a184d36bbb491825f5d0584f6b5dc5c8e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fdb13b4-5ef0-479f-bf02-7a937eeaa578.json and https://artists.proofprofile.net/proofs/artist/2fdb13b4-5ef0-479f-bf02-7a937eeaa578.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 0x61d2ea683e2b2af593e288d20b511d11cfbf9f8d5def3da62e97cd561b5a8ef5. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZ7782309566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64532ab10ad267e003df98f78433af2be6127ccf52dcd8058da23dbbc6ad4d76. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ7782309574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65a726578f9c0747d4b085a2b3e4c15429936e4a8917007b42308bf84d6e6fa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA472329002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d4dd1f7deab551435fb567d5dd72de12a65e4b401686f045e10bcdf8f2b6a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA472335014.
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 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 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 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.