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 0xbbebba30e03a103386abe3b6cf691157b926a2654c58302b90af544c2ef81811. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df6fce08-12fe-4523-91fa-2e22b84920e1.json and https://artists.proofprofile.net/proofs/artist/df6fce08-12fe-4523-91fa-2e22b84920e1.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 0x8759c83336c51f6d7dcdbcc4fa1dedd2c464fec98bbff4b4a557b576df7f64c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7R42455111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58560fe68fab9047b89b9d8b8f52ebd6295ca70976ec2357a10f4258b43a3f02. 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/USHM21889128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250facf0223b1756648ad623c40c041f396c876a94d6a43fe23ef738c6ffef20. 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/USHM21889129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18199cb7a0ea22de937ae0a0fb828b5d26f6614f7b083babd0430c27bfa33752. 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/USHM21889135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a2bd2cea060637076a5439605e4c19c09254b4352ee51866681b3de07a173e. 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/USHM21889136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de0988706d48e2b61df490c9f6c5dc910bd9375c5186f6565d65ed26f85836. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM21889130.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bcc2c892f07be37b3beaab5b324c931e4dcadcbbd0db8340180c9ae404973a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM21889131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7671b73f7b0e599e829522885962e2659102b914956298b08888ddfa54b687b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM21889132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce19a5025719ca5d9e1804a970a5d7eeb458ec207e037eb2ba214f4a186fb219. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USHM21889133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82d089ad4c4e81ec0e044487b3704369eeff1f92408c269faed188c015162c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM21889134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a76af5afecd766223f2836068358c7019405e9b0ec43d35f5628db9cb09c1. 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/SE5751917767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593f43ba4885fa88f5d98ac713f42625f9d1bc6d92dd03bb19e39f6e69cd74c0. 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/ES71G1921044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf94d4e27e0a64012fbba80005663bf78e2b990146118bbcd17b6119440fcbe. 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/ES71G1921042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f539bc987011ab9bc734b7a1086c40e458e4110cb27327b36879a051ba70238. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ES71G1921034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbb35f8896df69edf012c9d30d509d9a8871aecda2a835ec6015a8d32b750c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6M2343922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb32169ca89c9ac7812ba1b60ea21a2c17f572b7e43cbcf118e7a82571d0caad. 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/QZK6M2343924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231d7ac3b078efeb9e68e3685eee347bf6b68d3f1565f385c22cd15cda8b21b6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6M2343925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1373d656cae2f6ae8c8043b1f652551696d2055e8faf66b0f6fcf783e227fb5. 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/QZK6M2343926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e78e5c9eb39ba392ba2b1f690cecc8d910cf82c19ed7cfcb91615b2b0e4f740. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZK6M2343927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d760be59b946ec082c5654505812708d18432015b85b6c3e301616bfd1f54b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2343931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ced30a65478d661e84ae3b2c16d610c188a07847d285c9f6372f74eb8a05a7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZK6M2343923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c9263c3305c0bb8bcf2d09c01715322c54680823e7dd1436f4752e78e5839. 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/ES71G1831094.