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 0x5ff6e4034b0eff3139f6d8cb4fea7ae3db528ed0a1220be7c552fbe59c263b3d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73781575-1b8c-4c7f-9490-c164ee6b4b36.json and https://artists.proofprofile.net/proofs/artist/73781575-1b8c-4c7f-9490-c164ee6b4b36.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 0xac55f6f8aaf697c8aad879fe372b9b57011eb400ac808c168d89c7f07e633cc7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX191202714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f6f5216869fc9b0812b1a708ed0f4e214e228d3656ee0ed7bc1a8156de7a1. 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/FRX191202718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ac45d0bcec9ede8431da83713e010286a786ceaf2d69e18914751899de514. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX191202724.
Mon coeur est un accordéon (French Accordion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b480c69d6d5394f524f413ebc6ce1cdd3e8eb8d860a2878b66666b3ffd6503. 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/FRX191302455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b53df59c8827ff711bdeffb2a7b5c70d70f9dba4ff1047548afbb5c051de900. 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/FRX191302456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b01c5a50f5b92051c1b22626ade8644b263cae2e933e4cfbe47a54c9246f13. 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/FRX191302457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5085b62dd2d0a08947db9f34438fd0cd0197944bf7b9cccac27f0be639923efb. 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/FRX191302460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4a0fc6083aa2f8b10e969034e2d7ade7e7e4e6a28d5142f2fb94e5858101f. 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/FRX191302461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bfcf2af414eff6625bd4f07e3b2094cd746f07434da7de01977c55dc77a36c. 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/FRX191302462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88c5f2915ecffe3867167e9c2d226d6e8c45ed62f3c9a3e44f18ebd0841654. 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/FRX191302463.
Nina petite valse - Dans le ciel entre Tokyo et Okinawa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a63266d705fcb97622760b84efdddbc5ef9c61933506c5f6616b6362575e37. 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/FRX191302465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee97cad34155db9912a42619af522b93691dff6597454b52b192d7e8653d6b4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:08Z), 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/FRX191302459.
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 0xb8c49fd746085c2f31867fd596b3cade0d1b17894509bac917fed918b28578a3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX191202713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6621d21d1e1519cb7cddecd38e67112bf0b4a070b868a26330da576a3623b19d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX191202716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef69c14f0a4c21d5753b5b73cc2df7759606af583eed323d17aa55d246f56a2b. 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/FRX191302458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d45855094e7d76451f8a2d10d503f8a8d3f55f80dabd37194ec2dae0e1252e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX191302464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f3829fffa1401096055854996376c9e4df31a3d232f0cb1bc6ada69c756ac4. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/FRX191302467.