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 0xac086ea1e3b99f560fc36c13359e6acb2f9aafd67324b6fc9b9fc857f8dd9101. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4230590d-8624-4ee5-9e41-b8300dffa610.json and https://artists.proofprofile.net/proofs/artist/4230590d-8624-4ee5-9e41-b8300dffa610.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 0x9159ba3015b0c7ade5c2daad57b1ea0a95bccdfbb58bd03e4453ae107204d749. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE4RV2206002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac8f28f2813296d7cae089f3cbf155c25c8d764d31af50054389a7899109b2. 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/SE4RV2206003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21741e4d3e8daef2d10248cdf94628866cc890d294374ea2cd36144902278909. 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/SE4RV2206004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ae337a724312592ff3044c6aca35ae414d8447e1451df2eff0b34106ebfdf0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE4RV2206001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c4a2885c21a2a0066a55939208e84a40ad7b870e9caab3b8135b75541212c3. 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/SE4RV2206005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab82493cad21552af03aa6c00eeea2091b61a49e251e1952979254ebb39b8f5. 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/SE4RV2206006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d3208f856c2c476cdf74216b5ce96ec1830a266b57fc044d78c4d80711c0b. 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/SE4RV2206007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa3c28ed4e7a28127c43617a31af57501280d78790f9de0ab83883ee53db92. 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/SE4RV2206008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51cd653f4ee08ad45c48e431208fa5084c3f6622f67504eb0e9867f5bc15cd. 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/SE4RV2206010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d86a30e3d961e358548346a5abdfbffad8fbc6f178eb06af75fcf2a340b145a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE4RV2206009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca90b99fef936bbaebcecb19ed068536039024d002f087d262844f121ae0e2. 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/SE4RV2402001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac8f28f2813296d7cae089f3cbf155c25c8d764d31af50054389a7899109b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE4RV2206003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa3c28ed4e7a28127c43617a31af57501280d78790f9de0ab83883ee53db92. 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/SE4RV2206008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16263160491f1b03672074963d711f6a5dbd5e17f01c7818f698691c4038c77f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62158776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba2b64847828a50e970de2a8680810783adc26699260b92596f19e803b845e. 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/QZES62158777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d014c40aeb2a8f4dbf4fe87a8c8b133d80cdd395bef44add6a965fcee98d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES62158778.