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 0xc939da616a3bf416a318ebcad0b3031b4f17997bb0143b6ddc3c6e87625242d8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c3d4da-2e08-4ece-aac6-31ccbaa4975b.json and https://artists.proofprofile.net/proofs/artist/f7c3d4da-2e08-4ece-aac6-31ccbaa4975b.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 0xed3a988ebc6ada13962d0d36ba0780b6354f82af4dbfb4085c7713624167dd4d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM7281549717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda419c26c7429a865c6f54f8a3ace1187cba647566ce945a35deccb1000abb7f. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QM7281549718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193e6bbf30d3ce2a20fa712664efc66b1a1df349b6a64a3112fa550f09d29a33. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:31Z), 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/QM7281549719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45f76fe13a7cf71f767120473af0dea2019a5380217472cc04bf19e02e73bd. 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/QM7281549720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c6f3383b210c616de31e9aa4c91bf63593088203aaf955d783f8799bf1987d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:25Z), 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/QM7281549721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258c8227c463fff0078c93aff1f286e2282e1ffbae8075337e67333208129f2. 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/QM7281549722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d4ba4465764377eb37dd4bc4d4a67c0494c188adbde977f84eea3b919190d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7281549723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a2f803ddf672b8345ad6dbf7e3d3fa204cbd094267be9bd18ef44b04403047. 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/QM7281549725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bcc1344fcc5796aee97ae221f97f7089fed6f9e3cab7024aa1f18b43c240cc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM7281549726.
Las Hermanas Núñez y 7 Grandes Duetos Rancheros, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676791c738c7b8bf4dd3288f328d95c23190b9ecbf80ce6706c1e08908dd3ac7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:50Z), 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/MXF331110848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e11ebf00e64936e6c4e09c9a717ae2c395372d20ff2104272ab377b2121537. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/MX2620075307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14b3d3f8196c0d30799c0d8ebfe3c988e2bddb5c4366ce325f545022ce38a0a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:34Z), 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/QM6DC1525420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb7e63aed8df4726babade65fb85d29a4ccf0c4ea7d0681470c27615fdfdeea. 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/MX2620075306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ecd9e85db213d4c0c0fca25eb33ef2dbd2fbf78def6a28c0377ebeb840626c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MX2620075308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57baff137d0ee446b26ddb8d98e503a0ff9b81284c987220022dfb469441f43. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:06Z), 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/MX2620075309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82bf53664870565ed70ff8e94c2074ecef960ddf72439f26175159f504dfbca. 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/MX2620075310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101e192eb6795dbb975a9b54ea45d03ad0ba5a53ae3a285eada8d1bee32c68dc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:20Z), 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/MX2620075311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a182845eacca3802f786b959b63a053b44adf2b2aaeb48bc7eb841a71ab2fc. 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/MX2620075313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8be737b76d34bcf78fa5d8494138def7468dcdec285bdd1760e5ca415813e54. 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/MX2620075315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c02b75efa0b338763d5645fc849e50051f7ecd5f3711ef91a6d910202c4e271. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH1803332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f19abee5bf9de6f029f3637ebd9d5c2116ac95e0f551054691339860fb64d8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDQH1803335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b65e1aa7ae667dbf907b4c1a31e925dbbca65d089ca9d15ab8c0960d1509db6. 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/QZDQH1803337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c9919209c934e492e4838e9c879e85f10e473bb5930db68ddd18d7437328d2. 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/QZDQH1803339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2662062e506402096e791f82cce1627bdcc11bb0186ace1a3827c00810da18. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDQH1803345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db1dac5e5d1935b9439df4625910c77d7c00f5ac016f4145c73cff36dc999a8. 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/MX3192305504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0843cbfe0bb5df51bb9f99a8d3c3063679e75ec98c350150f413d1efa6073. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:30Z), 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/MX3192305505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0843cbfe0bb5df51bb9f99a8d3c3063679e75ec98c350150f413d1efa6073. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:39Z), 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/MX3192305505.