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 0xa719f7fc52c89f1666afa73359fbd4d5ea2213517db7ff58e555308d26549215. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b66e35a-a2bb-491e-baad-6538e4494244.json and https://artists.proofprofile.net/proofs/artist/0b66e35a-a2bb-491e-baad-6538e4494244.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 0x02006f0e4c1e2a12cfbc48afb3a5552f3acab97a615ae2d6a8f016f119c008c3. 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/QZMZ92028689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f88b0ea0b4ac90b03257bad7406465976c2c2c87fb29a0d6dc9d83749d1aa86. 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/QZMZ92028690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299a8c6d164dc7c91d41b52450eda621b09df053fdda9da8d3be55110e11cb1. 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/QZMZ92028691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab934706978dd0fff7ebc76e2b1e83ca740ddb807c3afb5b0b5f4b4b080af15d. 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/QZMZ92028692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b6b12a39276de40938aafa0fe7ae2bce4d571a14d1b985c500868d6322550. 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/QZMZ92028693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbd97f3211592c013b40a04191be8f57e11a42734def357866ee901346122cc. 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/QZMZ92028694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa4de1497f665a073912082c634d58319670b944a43fcabc00ea4b184487af. 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/QZMZ92028695.
Sonidos de Mi Tierra (Versión Orquestal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dcd038b2e0ff4ee80f6005ea6cd13359c9fa582a40958a393be4e55d3a9889. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZHZ52104280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179032705c075672af36e4600a670c31020a356c04689dfa36535f1ea3e7ddff. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZHZ52104281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9280a89df3a4c50cca765b063d81ce2580bfd3d214802a96658d319093ecb219. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZHZ52104283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2ec21262536cd81f9179f8d3b0fe99defa04b6fb4bf4c41f3f4294d6dba71. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZHZ52104284.
Sonidos de Nuestra Tierra (Versión Orquestal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd28c4990f96e7ebc21f8bd81cd7a31c74ae1bbc66863d83ba4470f5872b5f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLS2341756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aec6ba50fb3a01df44c1d8e9a63915278f8ffb700ba79164df47c41af22885. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZGLS2341757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f3f437d37e6c82c6280234d0876aa3083bf7aaecfe34bf2798964273999f3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZGLS2341758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9224c0713e495c5b9091ffc39d8fff80f816b9c907782c544c0b9e19c71a3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZGLS2341759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f3358fba143f9dbfb42f5e0240a600ab732692242e400c4e0eb4c613358ec. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZGLS2341760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccef77dd7f46582e9ebc32cc97c2de614d86e8ad7784d4534a39134c1ba8c04. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZGLS2341761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247df68d63a0968efb2a5ce2c74d4b36838d69f1a13b2ba39d1acad51eabbfe3. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZGLS2341762.
Sonidos de Nuestra Tierra Vol. 1 Méxicolombia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe2c1c54c3b0b64f95347589df1b288185822c28bb9fe9035c4e57877ca7f0f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJW2412259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15769a7402f8d2d68e5273d55d6d2e13ded01229979c9b30e7f11654acffc2ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJW2412260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df29a06f0ad303014bebcb221aa96d5f21e286db7d6ff134ec2239db2eceec. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNJW2412261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6751e02576b4848f3bee97cb58e1b3b3311080e590ef9afaaaf68c5cc902a107. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZNJW2412264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855191a9febf2a1cdad052195102fd900b17bd6c6a96a92e545142d393fd5676. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2412265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fa874f0dc8ec7e82ae1e2c718e88f98da35ff369e81ad1a3313a37030e60a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJV2588139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc581e8e89519ce3ac2518a9f23fc75bdbebfd04b9c16a6d354953f78c2b646a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2588349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea9c7c2eb5bf6282ef7a2551221a2c79d72d93b1321571b9d1de906a2af6bf8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTVM2509987.