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 0x648f4062d4d42fd7b7f7aa5167628484e849433360dde1975bde11ed756ff15a. 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/0287e0fc-95bb-4b85-85d6-d114cdd9537d.json and https://artists.proofprofile.net/proofs/artist/0287e0fc-95bb-4b85-85d6-d114cdd9537d.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 0xb0217f667a4eef917f08415b653ad66c5a3409b3297748e2837533f786d29f46. 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/QZDA72237125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fd229e1b1b922bac864129baaeb502fbb1964e8d9fbbd71046e150ad71afb5. 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/QZK6K2047405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a788d49a1ff2a26005a4cf4222002da7ec20291fc0b8db0d71ad2f08dc8884. 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/QZDA72237126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961113684711ed4c39cd71120a5a0ed90132d3fadbb2ab1f124a1f28aa2fd394. 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/QZDA72237127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca7ce64b033c5141b2ca9f83360c9d178e5757baf9cb03acbcde87ba6f3a906. 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/QZDA72237128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf417d09c9b6a99e244f248dc8ac494102e4031c3ea7bae585b03756a0a07921e. 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/QZDA72237129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b829b4ba6c71c06601742a54bbbb993cba6943e9d92e20bf060689e88b5fa21. 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/QZDA72237130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43943c35f323da90bf7091b1aa60e8e1c02d2a491f1d7d4eca0e8921ac528acd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:32:33Z), 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/QZDA72237131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d267b956d6862fe58320f47b3809ea1e64c6abff24a75c7667685ff8ead89e2. 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/QMAAK1916562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf322fa7e94e4111f7ce784ba4bd0202ad62d01a6f9d50e2eb347758b51064de0. 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/QMAAK1916563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e4bc8cea22a54b951d44395f7d57e06a829aaa0b01f871638a42f00484fcd. 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/QMAAK1916564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53824e63e3138fb6145ff8ad45809aa0922f4cb824c440c211dca9f79d608715. 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/QMAAK1916565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2568a6f6ad2b300b01cd3d17354099d0f57d42e6e6770a89b4ca6d4ecdf8eca6. 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/QMAAK1916566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3872b2cc22398e9e36bf870c93c75e74848a61fd4051cafff6dd15e715f554a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGJ1926517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d602c3434473d1fa02cd51450631beb6f609a7efa5c1f014d3a787a4fe63df2. 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/QMAAK1916567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad121aa95d5059251fc7d23b9fa0b01bc29534c27162f1a46d2b2bc85168ce56. 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/QMAAK1916568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c04f4f1b56a126c0d9e8752de85ef8a47364eafc87f9987a812e87cbbe6b5df. 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/QMAAK1916569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcd2bcf40b91c036472cef58b9a4d1556e85bfa71a5440877db361cf2cae231. 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/QMAAK1916570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8bf835387f9dab19dff1872686489366c69a9a5a579b13eca9026828212a0c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDE2435292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0c7f1ef5818d2a8cd2dc29160a45c085f4846bf8445b7de5f0a92bdecb4068. 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/QZDA42482809.
No Surrender: Hope Will Arise (Acoustic Reimagined)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce6615574493b1e54982f2015289f9d86cee29d0dca3f9d2d2d80c2b85a685. 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/QZK6M2345728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b699ba3e5337e240837c9252f2cff2277514d43f9f0380f619a57f076aca843. 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/QM9A81606303.