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 0x4f2f7a1547d06fda084c03dff425bbf5292bcef83f780a0e50f761e7ab0975ec. 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/eea02de1-5df1-4398-8447-e64156305301.json and https://artists.proofprofile.net/proofs/artist/eea02de1-5df1-4398-8447-e64156305301.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 0x355bfd1d4f34da28ecc4b97531cce615baa0fa9f0fc034c307d9f3173f6af2d3. 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/QZDA62458342.
New Amsterdam (Music From The Television Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf5c9c5bbfdf653966422828fa9ccaf12846d486feb2b026a452a85a3f53a68. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USQ4E2100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dff41754642998bbc25f739e86fd77ea8ca6a5b2ba59baf924ec467e3eccec7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USQ4E2100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e78d8b133bacf27b134e53dde962503ffede6f09c3407886ab5ff85105b8dc. 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/USQ4E2100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf50d34370d9a7d20c9185797309bb8c3603465cb4f4cd62db821c572f39ca40. 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/USQ4E2100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c88b0b4e88410d2c127eba54dee3c75a65a2dbbe34af7107f3617386a05820. 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/USQ4E2100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411acb688a6ff9d69251b77e9bbb324b95bc83bedebf320566376b5ecdf0a752. 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/USQ4E2100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f94114c49cb8e92984b7b4ee6afd893128c9d5ad70d3ab330ed30ee9c8d61. 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/USQ4E2100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52036543262aead123d243ad37ef2809fc69e70dc5b931826eb6167c5032f160. 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/USQ4E2100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ce9e85d62a91a070c86abac9e9c1cd6f9dd432b56192c33448f30cc07e70ac. 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/USQ4E2100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15fb0ccd465d1276e72440568ec53fe49188abb88a328a348df3a793b177d1. 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/USQ4E2100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4f966bc8d12d15f29c9780c0d9aef57ccee17e82be34692504239eef4d9b7. 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/USQ4E2100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb35877351f9902dcbf0ef28cc56b98ef817df8df022cbdf5354b6f772e53b2. 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/USQ4E2100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0b05eae273b6d773d5929b709c47bc20a2cdffeacefe2575af2fa002b490e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USQ4E2100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d828f1446ec8a5d1c6587e569c9acdbeb0b8f931106365473072b8ad5edd9. 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/USQ4E2100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2267a5a31ca94c2a1e87b4a2d72297f5bae81aacc7cb49acc762a03fdde6d13. 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/USQ4E2100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac13a1015da86f88c71c69d8dac9fff26926409502b1df85481adc6e694baf. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USQ4E2100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb87a109451215b0c70a1409490c400c2b3f50e3562eba35bb24ecca9ebb030. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USQ4E2100267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e69df85999ee3ebd8fb739ac05fda5c7bfc8e079f375176e6e5a92745ba8b78. 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/USQ4E2100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b65287c6255507a0bbace8d50d18f779ed4d1573e302420d830b90f4751678. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USQ4E2100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0adf0a5ec78f021c3d99ae36c93802866f93c94e3e0cf973bc755a8126bab1. 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/USQ4E2100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dbaf455c218bcc7ef87a9a3a5c6b853993f06ed81facb4fb78679a742a3b72. 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/USQ4E2100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf85a9d2b6f8f2dfbd73308a0644d07cbb798bb6e7b091f6fecc609ca3dbf8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USQ4E2100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85b22cb9a655ffe3b70fac4e090cec65584501c07b1e08ac1eeb609572673be. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USQ4E2100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38e2fae7dc7e0de7d16540d6b4343a2ae6e204c81ee757da7bc32e95ef33f4. 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/USQ4E2100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75abf816d7b14afd158c84cfa43d7e019f48c534249076a609facd4a5c4fb029. 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/USQ4E2100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53afbdd499d5f6766edca11af3394545d59ae8e29dbf5ca572a6a8639270817d. 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/USQ4E2100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf195c17e8dcfad121a82812dac1beaac981e49813c6c7f375da8ae9cc735d9ec. 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/USQ4E2100277.