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 0xd9f2f0e68a4f0614e39038dffd9d01c6cea7be7e98304a7da3fb3b1741193de1. 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/48819312-9589-41cf-bcd3-7a20f7c1ead6.json and https://artists.proofprofile.net/proofs/artist/48819312-9589-41cf-bcd3-7a20f7c1ead6.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 0xb34645895003f46fe1b1a66a63b01dd5c9887fb7fb5503b1b26a71275c6bd4cb. 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/QZGLS2338865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf513e237172294129d2e0c2c723f1e50520600f3de6e03fa32e5b6c61eff2f89. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZNJW2383256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c806ad0c4cc5845264bf6bd8dd377432610502ecf281e0740399822b3d31235. 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/QZNJZ2343240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd67f7603f9bc001c8db7ffc3b0c2528b80f6117e9482b9b629b6a25c6236bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJZ2390783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3151dc3ec883b9915923a434c0fa9435ac61dca17a6bc31f77cfd761b67d4d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTVM2322469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa509c8f5399b38df942df6c6e703d0e267bff409c2ede47df779e17e148a9a14. 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/BCB6E2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ecdc8cef9c319fc7e2814d3bce51275ae88f17397bf13d9995b1031adba18e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BKT412400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf366be4c71edc995b53f5084d5697cfee6fc9dbe5f8b0b5b2b7e6c3a45fbf06. 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/QZNJV2419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b464561f73084aa80554746f112bd8046570794efd81f5204dba9a034e31c4. 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/BCB6E2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e78ab6ef53f24e1f1d95249851bd1761c3ee9660051504fc9c1dca2412fc69. 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/QZNJX2447938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b393c23a1577ab44a6d0dff47bdfaef01433d55b399d59502573acfdc5b17. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USANG2498797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7afe716748796a4e57878f3bce94f6cce36bc51c9cab78642b2682481ad8f0. 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/GXD7V2595342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b7806126b59210b1e342e1be413e742a8ac8b6eedcfc88f0ef08019390411. 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/SGW502593640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ccf7ce5c7861156a18396a8ce912706cd3d1dc0a00cf07d35d368b1b9a881c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GXBAV2071512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1b7579726b78c92874cb07d4be3f6d09b6fba23f103d90367c269b1477f841. 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/GXBAV2042414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a185068873441404453f5d41deb06ce7ce7076d3e772d542b2f2518ecaf71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2358052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeecd650f27c1889fb9e03b65ad3b4dcaf1732c2aa833770e0e3d423ecd41589. 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/QZ5AB2484364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e110f82236d63011eea6e8d344f8126f1f3b5035b35b61865633f2a1fca836c. 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/BRWMB2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184b4b74fe943f0175125f0c6a16b099389a59ff1c42467b1d44590492c632a. 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/GXF9Q2482197.