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 0x6080622d564501bb60709fa7d697a8015ec1374ba3a76e9f1112ec9d4e3a19e9. 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/4d0cdd79-bdbb-412a-969e-2e2f7aea5dfa.json and https://artists.proofprofile.net/proofs/artist/4d0cdd79-bdbb-412a-969e-2e2f7aea5dfa.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 0x7af713191c745c02c9cdc7a375878410f446f44d03badd9b3899d19bc37ab1f4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USL4Q2018461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328260fa00c9e81c77efde297357fe455e2b8636a269bede38645d6ae93800db. 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/USANG2188673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c22b87ddff16ab7f7f4ff3bce5c837b61560e5b6f3dff448f37d388adb3265. 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/QM3DF2153772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7d235eeba9d82cc7f2057d7d329153062d4a4fe99994221c50002f9557825. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL4WT2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469e105320ae6471b94beb943369f0ecbcd6a3bbb0916229a425f40258b93776. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/NL4WT2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456e5a820a0776135ec39728b1f2265b177b320c70b76fbb4c67faf5dd5f1dd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US3DF2226427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fb35968de36b9e6bccd66d257f74fe9d962f4cf2721f5d26484ef140ddd59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USANG2213926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cd515df463e67ee7b37c1036fb55167951ce9905add110ed86f3a59ff21dec. 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/USANG2216557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c599f3412d4dfd298f14ce7bda679990dc6dc75cdf2a510e5c054f0a024dccc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USANG2234370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d1ec9f441818eda5f6161de08704d1f7e57deae9e119419d3c27fbdae212a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA082264451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d126892eb70825ef9db36b8f9fc57e8f3c61ec61cb3d8d2fca94f11abb425f3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USANG2262328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6f65227ce3c5cb8b67e2d71b37dac85a5b7d56a035b3d408eab8d1e75a75a. 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/USANG2270087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df9914a0b963c2626cd666db60e0cfb23ecadaa20bd9827a4df63bf851fed0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM3DF2214268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8108c5bca1cd53ef19663b0920ab1862cb79b6077b44d84185a60544082820e2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM3DF2213138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c5e5cb198e9b734f77e30d95f5658788c95501fa0a9194631fa61495dfc72e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM3DF2257435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a42d89a9702b50f86469147914606ea4306583d35a30d1e55c13892ac1d976e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEQ022384189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b6e1d5baa483b39d0d534a21f5dbac7fc8eaa66130f89d22ee6808217c22d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2307819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf795c22589061bd87ff7b4aadc110f2efc4fd08366aa1a5f14feb067e98dd55. 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/QMANG2214590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0fe3144eff66eefa773915318a0ff8882ae4676f7b27c2de7a35f0af5338d0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2427290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e96963499b0fef3de4261ef61b3545d4e798084fc7d2c147e8518c1945d61a6. 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/UKZGC2404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706ec9004f6bf7536b215634c937d58c36775f4eeb201ce2779b22ce1eb9f40. 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/NL4WT2400190.
Schubert - Ave Maria (Lofi Jazz Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b6e1d5baa483b39d0d534a21f5dbac7fc8eaa66130f89d22ee6808217c22d. 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/UKZGC2307819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65bf0c70164acad43ed7fe5953790dfb5f02d501e67919e4d054cc1a68ddac. 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/UKZGC2200804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4b6ce9869ca19b0befb9fcdab30f06ef67ceeb4a687cd74510be649c00ec5. 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/UKZGC2203430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e96963499b0fef3de4261ef61b3545d4e798084fc7d2c147e8518c1945d61a6. 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/UKZGC2404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ada1db2a6be3c1d3288d6dd49d2b6cfdcd720585b8c0378f7f5c761959bb02. 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/US3DF2472071.