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 0x2e9fc0e139563e21d0a08d2bd0ed33937f9224893e6e6bbd0899cfddb990e252. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94525bbc-4d8c-4422-8601-0a0a722212ca.json and https://artists.proofprofile.net/proofs/artist/94525bbc-4d8c-4422-8601-0a0a722212ca.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 0x689c06d16e93f1c395718e7d03c2ff48edd9c5c93bf4c62946e2323b5eb1046f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX3Q92496208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7984e9ee61555b379695e3adf5a5383b71b2a9cef1a1aa2c6d8af27ae14ddf. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GX3Q92496209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697abc23b8c78815d5ecb6b641bed73a7b9b692cd873f97777a22afd121f972. 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/GX3Q92496210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a105aa299bae953d80bf34080722d8f715e32b69756d9ee74d65171dcf7a1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:34Z), 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/GX3Q92496211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf8384de42125d01df91d146350d85513cf1966ddc070d73ce2403d113b283c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX3Q92496212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf5af8cfa492ee96a8fc9a18e6f501f1fc14ec1f3db2332cda5c0d14238bc1d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GX3Q92496213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3a2a4b858b65376586d7b75e85bf1c0398740e11c36d95458950421a5e710. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GX3Q92496214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7a5c8bb764f07264528814ec63fa108ced85524f54300c801d7348e577ec54. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92496215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b27f3c76f0c0f93132240ce7a6ad1a71681c8a43796cd957bad03313850fb5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:56Z), 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/GX3Q92496216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aefff0c1386f1b17fc68a29d58ba73c3e73e818fd77a6075c5fd973214bac17. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GX3Q92496217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d56d23bdca5c3d548794e05b039bca579beabeb240b0bc4338b4c1ebc46d04. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92496218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd478a0373aa76d29d612995855cc3ff5abfb32ac7ceb6347621de997c23302. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX3Q92496219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590777e19b7c89809387cd410a3d381b86f9c64d71902286a6dc4f9205630ab3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX3Q92496220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f0376a79bf56acc8669a38914bd90ccffde9f53613f8a0f850043c22a45956. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92496221.