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 0x770395380d66874d6a034a20ad9619e341fcf191e483924ffadcebd5459b9d5d. 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/a948ef46-fb6f-4216-a9c2-6dd5eb759ab2.json and https://artists.proofprofile.net/proofs/artist/a948ef46-fb6f-4216-a9c2-6dd5eb759ab2.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 0xb18c14e269c01ba7c4f6721900b2e9c4c3e218e33c058930246dfb772e634505. 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/QMV6Y2000002.
Jazz Quarterly Presents: One Smooth Summer, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90652b18191ab9eaf679968a8dab483fa45271f2f0d6ed95d73ea2c224490aa8. 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/GBNYT2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966e3a54cb6ff961dfe73b3d703821aa8cb723ec7d170a101f92d6bc24ea94a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBNYT2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3761ccb4108fe4f648d962a9c3d87aa4526c06dff5e8462a12e6580ba9b6a7c5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NLML62400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d473b001dc5ffb945d94354aeaf94698d81efc13442391e5817a161f8f545. 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/GBNYT2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca0ae823baf8e0dca1da05e3f47f0a0a903a54f6548a326be060f72825e2aca. 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/USJ2P0800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6138559713043ea8de0f8cd717d3028c92571fcbdaa2a48ae99cff43f0533069. 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/USJ2P0800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3e84678d2a73fea58e7a6fc911d135889ae4291a959ee1688fabd61ccb1537. 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/USJ2P0800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187ae616605bc638f3a392b755fed9a917514d94b981f603c0531f2238965b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USJ2P0800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ccc3eed240b02c919b6d889d1e1f60a4d5fbdf65ff2edd07d54b44c4698115. 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/USJ2P0800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ef6c101baa207ece38c83b87fdfaa61ce1ff43c22f1a03b3b5f0860087095. 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/QMW931500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afc6794ca2d34304da72ddfdf8801e1915809ada2ac9a11e63659382ba33e2b. 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/QMW931500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edbb1e0c6803cf2f9e4686a0ebd625b8ccd01b2240ed4400191b8f7aaf05ee9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USY280780775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d868fc4a142dbd2b18e8c23592bdae5cdce7b6ca825f72746ad9c3ae523891. 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/USY280780784.
Christmas is Love (feat. Tamina Khyrah-joi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb7dca21455ba21670a8787a4a89d9537b37fcb4601566f307c69f974d4ffa0. 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/QMEU32503561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd217d3c022578e0e234b38294f8cccccd9069ef7009df3d1e5c9bed5c9c91794. 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/US7SF1956854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecdb1cedaf6ba5a498fd603ac1bd750aa78c7ff8a566abf1cd0b929863f4f4c. 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/TCADG1733329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25beb30ffec797065166cbef727fddc8664c2a2c5444c7dd20efc394b46e3f89. 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/US7SF2557637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b5e9734538b101290ab2d2b4d68905ad9dfd5d89cc775a0c7167492afa69a. 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/USJ2P0800325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ad02d98a0d1f8194bb11556899b2a62aad15e546b432ac63a458e6f434f0ec. 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/USJ2P0800328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f27dc4860fb16ca2aa0abc825a74c11db54cbc0e7769c0f16fb47e5a93202. 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/US7SF2457543.
The Crusade (Radio Edit) [feat. Steve Nieves & Gail Jhonson]