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 0x27d8756be174052bf968b1cf0d9dcaf3195ddba1bec996c7bc7b11f01e6f4ae8. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/224a6e7c-e4f7-4329-add2-781174f68214.json and https://artists.proofprofile.net/proofs/artist/224a6e7c-e4f7-4329-add2-781174f68214.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 0xdf0bd2bee5c036d3d8d79d6836cca5475b352b42530bce2a1a90656fd60e0a93. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F22540439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805786abe2b70464ce97244f68f45358f17ca732b0390e7bcd98df0367bcd4e4. 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/QT3F22540440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961fd60575dfeb3a7418ed64b3136186e2d1250241fac5eb08f7d8cdf93f132d. 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/QT3F22540441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c6bcb01ab4e83d4f4726e349a006653253874ab622ba121bb9b670c88bef5d. 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/QT3F22540442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a10f7f1cb4f50c64cf817e302b93c94fe0f1e975a891255e4b44be083fd7c. 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/QT3F22540443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5069d0c13d8fe78e8f6aa1f40970fd6e54085d1933f2d77891471a139bfba56. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F22540444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa52f834de43453f2d81e1912dc4bad4f67cd2c188ce51f3332c7ad65b8470f. 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/QT3F22540445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ee3c13d49f78537cf8fefadaab039885a74ec4407345752c2c6bcbf23a7e59. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QT3F22540446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4280b20489f9cd94ec913ef13e757b96982925a58f8076468ccba40f69e094a8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F22540447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b4bb11bffe16fc9e925f818445726d53a26876bb4336916da04be65499e381. 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/QT3F22540448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900dce4eb8895cb0e8f83c84b808b8fb34f782cb68c14097e52c99dc26623de. 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/QT3F22540449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353d4cdbd261e1a4bf646cb115739144092fb10466a5bdbc22b3d09f3c6c5a3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F22540450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed17b2ccd3455087810434ade6f2e9995005a4589a1dc87882628f16c17ab20a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F22540451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937059c1e60037b9cf69b312fdccf935e00ccc585b9d0fd543a058fa3021ca1e. 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/QT3F22540452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9624dff71c7e14662dfe6c663019b7b4e686ea9c53bc864209259d07fdb6fd80. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F22540453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3914fd19ee7a59d96b7933328857433146f859817532c4dd03248939545f72. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F22540454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd3db48493e2fca06df5da9d991820be4ee06bab68fee6739780a61310b829. 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/QT3F22540455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d4e14c28df8ee6bd79614fa4bfb63c01ca07326733da671f3d01aa8e1c0c24. 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/QT3F22540456.