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 0xda9db6b17797ae83854e4e8219d144eaeff5bdacae567bebaeebf003c3fdc178. 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/2bf1ea95-aa12-4b2e-8bb0-e210c7fc5558.json and https://artists.proofprofile.net/proofs/artist/2bf1ea95-aa12-4b2e-8bb0-e210c7fc5558.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 0xf8dd5ffc6562408f8e33011e5cd0b1a7e490e5815cbbe51fdbfb9aae45d6ea53. 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/FRY629025165.
Paris Musette 2 : Swing & manouche (French Accordion)
Paris Musette 3 : Vent d'automne (French Accordion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464c769c19427a4ad06317b982d1b3f5f02780374945ce153a783b6be48388c5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FRY629700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a997c166862fdea0aac845e383d4d2993c931ec854724efe80acdeafa8918a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBCQU0600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dee671da6cfa3e784936ec6f8be2932c391750707ddf00b4db9bc551d08541a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBCQU0600487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf0420ab9dc2c637e430148604547974194cbb23b58614d12e610ece4c81b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCQU0600489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb280c3dc03dfc54455f5d9486f1d63754e8c4f8c422164aee6227c05c81a6f5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBCQU0600498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d99dd22347c40231e0dd55d8af64be565131a00a82cc5f669a840ed8db898. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCQU0600492.
Que Sera Sera and Other Accordian Favourites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16061a25266d31541c8cf6592958b16a427dbfb0fdc5d7b31ac006e740e9a13. 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/QT4K52522774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03c5c9b62e12195fbde4057ef468d0b0a886c112651a90595a45444c8dd3e46. 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/QT4K52522775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f276953a9b4b46db9d6847d2aef8d4bfb43ce7d9bc6481f011e7fdf3ffcb46. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT4K52522776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae835278140621638c143fb55ef324220c0062432b5edda767b221742b5dcf21. 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/QT4K52522777.