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 0x5ec44dc684ee517a4a6cc784ee27494a9a5bfb343e3e50e78f00ec99190664a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b96fde58-bed5-4f82-a683-c805e9859933.json and https://artists.proofprofile.net/proofs/artist/b96fde58-bed5-4f82-a683-c805e9859933.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 0x95c6b19cce825de56a92a930eaef685e856229ff6c54808406f09f159af062c3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:22Z), 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/QZFZ72262276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989874c8033e051109c34a762dbf15b1b1f3ad510cca2fe7c23cbded26dd214d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN92285566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff9ea41ca0b84a7fe8a645476d3c7fac56148c378d2c6fcf85a69b3d8b43a5e. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:51Z), 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/QZK6G2282300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c44200b9b15fb5ea72c1e15f4f1b05a140b066adf148b354d3fc2a0b3537c04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92388774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce831d62a9701b605bed1e5d34555f29bb326c4941ace49c48cb91cdba3f6899. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:40Z), 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/QZNWV2324242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6743915bcd6f86a64a1039b81170fa5c28dcb1cf73677f8a0baaebea92fa3d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB62328946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9a55f19034245b71bf62c29a4d40fb2fb4c62db96e9ef084aa6056d99f14e9. 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/QZTBC2363101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4934e4b39a0ef44cb0174fa24fd7d1ad36b17aa356228ddcf75ec29ae44e33. 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/QZHN32474616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5ec4ae79f989c5398297ddc241bd854384a77bb592867b872f4a21521fea4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFL2408613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736cd0e45634838f7a1e9bc5cea1103496fb005347177215cf20996f351f47e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QT3F42403006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7617abf757cb5f79328c72393db2fce821e9bf7a1b4700e7cd636183dc5efdd0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ32567637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22b17572f5387efc7fb80b7d36ca0d1d3d6e93acb0a2a51319b90e8422d36d5. 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/QZDA42535100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7803667b93b5d00e5679e25b6e7dfe97670ec781dea71a02030674b829078f17. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:00:48Z), 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/QZES92515931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f895c36d726d8523d513cef7f4622e414f11985ea9a64f1e49f735100e46a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZES92525366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92511133a67e238bb9ad1852041eb8f3d7304844988907c580a5851748ea0fea. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN72524670.