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 0x61965a21d56a4722fc46ac62e9818d35ec01941f69638deb75fe8289f4a7ed51. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb4f8ba0-6d5c-4bde-93ee-ab08601b39db.json and https://artists.proofprofile.net/proofs/artist/eb4f8ba0-6d5c-4bde-93ee-ab08601b39db.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 0xe15e76a0255f7ca4d01f99c88871c8cf0b09789c393343944b65ec1f8fa637b1. 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/QZ22B2084779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ef652ce8109b9fa15047fc7142ab0871964050d7bd3b39c1bc5e29e5908e9. 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/QZ22B2084782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0970e5f39a07e0a1c84e9a7213ccd0a6d9b6897bd85188a30577d8ce3d7cd14c. 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/QZ22B2084785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec7fda544f98a2c194502ccea44209d4d5e522ed863868c973d08e7e86c8b6b. 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/QZ22B2084786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818c28b022ca50447b87c366ffd7efbf5b4cc72d8245ef69121b830924503bf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ22B2084783.
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 0x68d64beec8d01ab139fd965528952dc307e8f9c57c466879af5d0e130d521b30. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ22B2084784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed978a5fcd6accff806210e0b1aed4661a8cd063cf5bbfd31eabdcbbdcb6059c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ22B2084787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f3b4b6570e6f004f36961f3056a5dff2956693ef04e241bdd47b78479cba7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZ22B2084788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515ac56ae41e2071b17212138490fc4c23b6be9b4a782af17e3bd8a2c2109e53. 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/USA2P1310749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3380296729f2a46a092102ce3fc343798140282826f6235f9ddd5a1d6f03392d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P1310751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c36377996745513438c37aa7d1fa6ae5e986dd63d1937c40788b58f4d7120. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P1310754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e61b35d54477d37f31f918b217934d84b9d72401f238cd3e4a086ebb74453. 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/USA2P1310755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd0c4f2644c0760becf965fd4ca73de08138872b00f30a23f541cfc1455a0b. 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/USA2P1310758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2451ebf2cf14d90c59778b0ae09a8d040a564057a41e2108fc9bdfe8ea6863. 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/USA2P1310760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb26355c8cc7cb5bef68b3d8f0bbcd63169e6ff1f29ba2be3d0245246a203f7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P1310750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce6fa332e8ded4d9cd1341097550548f18c80eb22245d3351f2f90306a3ce6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P1310752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd436e0060ff596db90db0a54d6a139af2f8fbfdaa6448cfa3b5246e8d3cf0f36. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2P1310753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b7bfd4e22d37b16c54759c3fea6b421e47cf7f248ef3b660b5c4ed35c8c8b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA2P1310756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130492b9981275c868d4db011413dcb3434dd8ba769b62be2abe53507bb2ee34. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P1310759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6946c0b8c0f211cb1168846bf27da114889c4ee2ca92cd42bf58859f58e7843. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZQAY2496822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ce2b11ff445f8af018ac17568e2f92819ba4c5dcd7dd020457e0fdcaa0870. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZQAY2427014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e21c1ce415f66fe3b5bb10440a6843052a9c08ac2f919e7db3f55adb3bb57fd. 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/QZWFJ2316811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7861c09b2c6c0075ec71ab78303acf121951820ba3066c0a34a607cde96c9e. 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/QZWFJ2316812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d001ec011e8e1996c330162419d0ee2596a2626b2893267d1bc241493cb57e6. 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/USA2P1432903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76049662e6d124dba0fc087977e3da3971852f3c971d0c89e772900a2a1f1c50. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1432904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d005a6f8628d44222cd9b847b7a714d277215aee6de57bc6404b519b44f0867. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P1432905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2793347f83c1a896d258a3b9d14f33e9c3d5a0f540ca656cf91e9c2b86ead674. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:26Z), 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/USA2P1432906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06131a43d25447ace57403faa0add36bbe2e9dbbc5d3d177ced6236724167f16. 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/USA2P1103944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7003fa24e5fb85b59c176244a4a72f579df6290b748ac5486b9e309ae71732. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA2P1103940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fca90c18fc69d8560ec407f9b57a5a804c8427ef83f7945d4adc1307531a9b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA2P1103941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b42b2690e3d06879cb1d0587b4ca6704339fef0996caf0be639f8f34354b307. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P1103942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675e0c284d74d753f32f1d895cf588fb6e4767fd0783725df8e7bc0bb88f3c53. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA2P1103943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3583aba4219f160f249a740bef96ce649c23a90d4b596d98118a2265a8ebe92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USQY51410400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8d9d911858d6407d921bfb94aac698bb71c45b13b4e7f7672660d41bf620b. 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/USQY51410401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0d8c3636d58a9cbe58af4130b0a881b0789fca84217ce170470299e728e534. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USQY51410399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6343dd41dd2b68290baa6ff4815e53da1fe073f5b7ed4fd43ccd8aa0595b2cf. 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/QZHZ52087828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbeedb4c7e7849a9ebba6500d832902a9cbc4726d57ba49f7cd750a464a57ea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ52087833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351413ebafa2fe10045ab3667a196194603b860dbdac36fac462f0f4bb3c427. 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/QZHZ52087842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185697042547133321be49077a9fe7e9821dd97d463934e53489ed6862b6dab. 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/QZHZ52087844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650d9923ac6e66edfda2ccec601559bbbe6875789a8131f55bd51f2651078023. 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/QZHZ52087855.