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 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 0xeea9529f3b556f1b82ae0049e398e95db392c319f9ef4d93bfa9218593a96473. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5447260-7f32-4bbc-a1c8-d8f943643c05.json and https://artists.proofprofile.net/proofs/artist/c5447260-7f32-4bbc-a1c8-d8f943643c05.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 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 0x9a5854d6029cf6440451dbab4f9454b82746cadd5c2332cabea6d7a72f6911ab. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZWFR2522293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31925adf9e34a3cbc0cf7c1310b67d6bfd1354064a6e3dcb3c990bafbcc22933. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZWFR2522297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5425f5d4f9c3a18f364559698b36554e457ac688fe347663a0f2459ad263a818. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFR2569393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaffacc6f4c23ac0986a3b47826eed92d6ea5952b6a541312ab4530efa8cf0e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2569391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f81481ad8e19f844139c432c74ebce1eae5c84e3f59191bb8f67c9a87fe270. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZWFR2569401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dad57380b071b20f6e8b94e03e62b742d88ba97d86de797fdb289faa2a9169. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZWFR2567650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b37bd3153f6ae2720dc11042bf848cd2b04c3de92a2e98364d33d7e76add4f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFS2520601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa553623c540ad820ee940f37ff74f0d5ecda17a2099a3bfbf21c0bb3de4f1851. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZWFS2522394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c668298b178672996a374973f67e04e339a6cd3bde510372bea6e0d833fc36. 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/QZWFS2522392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a63072495cfd711e59e6fda40fe352e6481eb0df7e618a8e911ae31fe52ec2c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZWFS2522397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8250b56599437e56894e24eacf426719cf02d39adba4bf00652f9a578607d8f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZWFS2584414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f70261dd7cda17e6ff2e6de0c677f4f29ca993bd1fe1e02574794bb05525fe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2533224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7365252a5d85c7970d83f7e19283460317187b108a2458e70c5a145dbf6b249. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFS2584412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52691d9edf86cad4a56d57ba1008d1a78639a26e8496ba9248ef3f033ec0f54. 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/QZWFT2530736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5216a6aedffe7082fd7e1718905c989a970407d3dec958ad93f9c71aea8a1b52. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFS2584416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbddad1024ffa7527a3eb9a26b422ea78684a83ae815b8df69e6b3ab45561002. 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/QZWFS2584411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54bb2a6126cb9fe7a16d8e4372a5707353de7c65f39ff59adaf890ea17e526e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2533213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3863ea321da199e9a908d066723857af93674ce5c0b81e630eadb57806579677. 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/QZWFT2530667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf3795e3209325df1fd5c49cc327900a3b46e6a3e54b4cc4347d8c809daedc. 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/QZWFT2598222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fa6c89e7cf3ca2fef8821595b30f859b5d89e2de59cd12d157947ca6a8aa9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFU2529541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43f57a39ce4b980eacd85a666344115997f84ffc4b4e5288f7a2e88825df439. 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/QZWFU2529497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592956132ffad5336a2f9446d373abdc1117caa9f2d6c17326514c2616c5faf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFT2595339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216d048ce0e6423bb83e026dfb441a01b9fd156f41994221aa2aaad00b837bc0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFU2529571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69975dd2b6665c0275041d23f08a70f474f8f0358c626315b45348d8bf0c1040. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2595395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11587b48c713369ff71fdd9cab549bcc08dc9eda22a2bf4297b089c043de3b8a. 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/QZWFU2529591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289afb95d52e663ba9dd0ed32593062d06b400a9354ffb54dad365138f283d91. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2595389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76f25d57bea6de0ebf4ab2a4b461a9119252bdde7e70f36f010383d06d85140. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFU2591570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37250b0a1a04c93464112440128ee12f0b45b073110130eac2436c64b2a215ca. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFU2593726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70b5653140ce1c8a2c7dd4ec91c709100700501bec34611c528ec8c1f0e680d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWFU2593724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6e65cda9b44d4a3ae025d2896c87708cb6f71d3d76267bdaebb1226c08326. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFU2593722.