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 0x057e00a885f0984fc0cd5e14c02c5b05c48da2d9be2dac1f9b22c994c7c16216. 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/02b15744-3236-4c4b-9f96-61b8e496361c.json and https://artists.proofprofile.net/proofs/artist/02b15744-3236-4c4b-9f96-61b8e496361c.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 0xa3e5550f4d1f8b03036a42aaca695c1118ca0167df3f60f3974181663501e13b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6N1992063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09f8d24d6c9623deb8c01fe0afa9377bfeebab1fc3a05dd7d61a417e1ce9c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:58Z), 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/SE5751999327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8046f2fc713c080da47a1ca7a154ad6ecda1fb4d0b1f9d2157ede5c21929931a. 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/QZFYX2035346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686f4fb556ee744faa5210af3e52f19b1b3c3535966782462ad83bd4ef4a944. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ42016627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bad13cb1364281d175c7f76b9cf945fad1041827b09158912a9fa12235145a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZFZ62019616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771b54f5aee523b5439b1a72fc8b29b95eb5042ca1adadf14008236b5a9e91e0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:25Z), 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/QZDA42003642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e400a53e2d8182c4d2bce63af55b3c5d2554cd90ea7e1b35aba5df0922452e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6L2007796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e4602198d736616e0aec601c38919a9f1d0c7f6d524794b4195f9911b0e5e0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6L2007801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968c6dcee65bbf5acf6a2c5a6dbcb8e2c54a6beb3a6630ef0af3b61cf037898c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLR862100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc665345d0f9ed44bec9b6157a8d72872e49e739c7fa29deee17e5be8ae625ea4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN42285159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b72e2138df2d1fc51ebae0d14a9e1d8fcb1b41b5fab74dbc207acef37cbd95. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLR862200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caf0ba456867dcf5f14dc0499307d26c3f112d97001b735d126995d9c85c729. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:38Z), 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/QZTB82203150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d49f89f9c44dd055d857a0a9e63796860f8e7ba10c44b83b33c4adf1806f5d9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/PLI360387751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9006f2917e17c0c5fe36599b049a7a8f447c916bc74a8f8ecaa6217d9013cc. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:19:50Z), 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/QZK6J2336397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f93547db7c5f68d86c4b450d91865d25783741899573b6a87c28bb4c41051c7. 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/QZRP42346149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f6c5f35776ba07fe6b82b686065457ff4efe58be9a24d9f13b87a16dd79ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42384805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf5b4fc0904280853131d47a98519f94b5d66538f020eb47616de665e4099f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:20:34Z), 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/QZWFQ2314647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49834733b7525e28f4c1ee6315d14dd6fef9b2af9968aa8c3f77a7d5fba5a6a6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZRP42489157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e58874b3c7d00a422c3ce2d4e437e215a5a273446f739bc8030affbdcdf202. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7U2459261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc192af67aba4ee9572309e828e9ad57a11dd82918f3725e815b82095a8ff767. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7L2546102.