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 0x6cd7861201b4eb917e7cc4328edfcbe4075169b75daccfff5542a8a52b30ab82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9740d8cb-93dc-4ec2-a8c2-f61ad27d680b.json and https://artists.proofprofile.net/proofs/artist/9740d8cb-93dc-4ec2-a8c2-f61ad27d680b.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 0x82243d0ccb82072f1a86b4150b4957263d7c010ac419511852f668bebc294b01. 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/QMFMG2341476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e7b007512e11c1c3f678542c81913b4dec9f79de236775ca1777074d5194a. 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/QMBZ92375068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96938e97aa589dfe31171c9db26eefaf94905905df2c86b5e662e7ff9d41a1be. 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/QMFME2337315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb145c33522eb01fe1de516551fcef770da3fea40cb71432b789a0b39dca3d2d4. 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/QMBZ92498054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358abd12920e63e8a4aa4e8c504b3620ac10ea1a41bbcdbe242e8cc0c8a01bc7. 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/QM4TX2453942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ee891bfc7c76c60683f748264d32b547439ee84ee146ed90d74e94a375dda. 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/QM6MZ2434073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f783fd311971bc1778f29c0f75aa13668b38396bf6f5a5a0baa21fe0f90d01. 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/QMFME2440305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea6df42687f0e9561c31cca573a5036a39570456998a2065c930b8ce09c32c1. 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/QM7282492046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db6e5096dd31d45ec9d1f8e17fce9a12f95ad8aef343113064b2dce428a1ee. 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/QMFME2440315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb76b04a40d693161e62d480003a44944b5994e4e93c90e9261e43670ca7f93. 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/QMDA72413575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e7cd49af90018e3b4f35dbdba47042ef943d3cb82934428102f2bcef2d45d7. 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/QMFME2440316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228443fbd3b513b54b3154174c40964845eef4973ce1922b2019f2ab4c9333a4. 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/QMFME2440329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed55b11974bd91b601282b057983d4c16c939cd136984584241c7623a290f9. 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/QMFME2437379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f95e05234780cd1a89390d820c7b4a5c0f1952fd161a703fcddd8a2695ae350. 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/QMFME2440344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a24dd92accad63598a8c6f43bef512c278690a430f7c050a3ce0437bb0c89c7. 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/QMFME2440362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d66887357e9596726a9fc3f0828e9069ff7cef450e06dbfca4652920048a6f0. 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/QMFMG2312040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b2ee523084a6620ff6682f6ed3e2728a8c37d58af13adf39c3db89a0f4d03d. 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/USSD12300695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ee891bfc7c76c60683f748264d32b547439ee84ee146ed90d74e94a375dda. 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/QM6MZ2434073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb76b04a40d693161e62d480003a44944b5994e4e93c90e9261e43670ca7f93. 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/QMDA72413575.