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 0xbc1389949bb15ddc6a1bbf2362547d97bf595193c987769f5f48504c64181dae. 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/de7a3d0e-b114-4d51-a47c-c5e91c022bed.json and https://artists.proofprofile.net/proofs/artist/de7a3d0e-b114-4d51-a47c-c5e91c022bed.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 0xecb521f3808cfc9d70b14e571546645990a559e970824aa0af69f0750f914c2a. 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/NLX1U1800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff41179e3c3a4dc3e1b8f7a28527aed9fafd9b7bdf1a7ffb3fb637f54d892e. 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/NLX1U1800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54febafa2d3fbe75baf7afc23ecd987a22e942ce0aec7a691730db02fae9de66. 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/NLG661800666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1f5b3d46926724ca8eb528aa7e525c95d41c3b025d74f7ccc80f29597246a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLX1U1800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a86ffff21f5917e1f7202145dcf7bd08316345f2b84b0de3e328039b1d1e31. 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/NLX1U1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e1383aa58af7f496e151c54bcd5dd062d23dc7c06d99fa3a01e2b9a43cba6b. 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/NLX1U1800048.
Gefocust (feat. Makkie & Défano Holwijn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d2085a4c04b1dee61d3187ca8585e808fa8043e2666c18e12e5141dca18a0. 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/NLX1U1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098908810d08671384827ddb9a2203593051a7d3e9568a9c1eb5172fcf3c9bd5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLX1U1800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd7f7c4731e7ab4dc2d86ce4ff17c3bef322e2a3e71c0482e4f5975ceade0c5. 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/NLX1U1800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f823d00951d0e57ca7fd9e7e291f141aa033bef5d7171daf96e516e89029e3e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWU2091912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63865bf571c5758d2955e3a128d26f029ee1f8b6612a0b13cb34cbb706992e53. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/NL3BN2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5f1acf87bf0a1a2262b866a3d6f094b65a1919ba1d2481faca224f753c1fab. 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/QZNWT2188254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e98b95ea9a56e41cd40f3080f76b97d279f3b7d3463e22ffb4f91d948ba824. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM6MZ2204998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6e2ed7ce50a72094d9090bc8660e3f01981ac7abefb40d27b22d8cbd4b158. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62229600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb637cb71b09c7a034ec5444ae33d788ca7f3f3a5f9524b096883faa58997b40d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMDA72251047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689e187d61311ee798d0e259882913a6c4b522b1dc53dedd3b26f5651c10f479. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM6N22287648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e98b95ea9a56e41cd40f3080f76b97d279f3b7d3463e22ffb4f91d948ba824. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM6MZ2204998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6e2ed7ce50a72094d9090bc8660e3f01981ac7abefb40d27b22d8cbd4b158. 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/QMDA62229600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c5a8367f049c0dcc0af7c3adf06830d7b61e61f11ba6c465d970ae5061d9f1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM6N22340619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d388983d6ff178519c8b4dcec22638b56bbd41a4640f880c47b0e720d211be. 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/QM6P42376925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44684e6bef4725ef153b1a35cff50dd9dd17315a03d5dc05aff574dc5f6a4f5d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM7282590844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce33091c7ba3f3132d5e7f5a695a2124529f44ade672ef5c4c3d760648cb7fc. 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/TCAFM2183504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92335c0cb64412c1f0b9022f4569d05552075f0347ff3e02ff6100760c7175. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLAM42200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20801aa11358b6c7199950aa2e4000c73f185cf947418692bd32246ae39b6b. 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/NLAM42100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21c9603dfc212a698780deec3bdc51e325a9026ff136eaf83fb940fe99759b7. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLX1U1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e45a614ffaef7009e93c7f7e15957726869abf005e9f96a5841de5becfc431. 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/NLR9F1800013.
SUCKA 4 LOVE (feat. Jasha Rudge, James Watss & Elijaz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a3ab0a373e5fad9c12c8387c1171b57e84d0e6658aed765088e1831089d53. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLR9F1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff830426c745da6b8a413f8ce0a37e876c9823d00834d673775ddbb73e82ef0. 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/QZK6N2058843.