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 0x328c5aa22be9f29442e9871f3bd89867f0754bd978b92f1ce71ba8a804c40f5b. 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/4f6164e9-98ed-4a77-9516-8ebd94c54e6f.json and https://artists.proofprofile.net/proofs/artist/4f6164e9-98ed-4a77-9516-8ebd94c54e6f.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 0x43e4c4f57c27570cf6c7b7056d2d5a6675eaae66e3c2876419d065c092454551. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBNRN0602501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86366ee6543942f05f70678638bc713fe3a84ebe53bd31cea4d71035b20101a4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBNRN0602503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86366ee6543942f05f70678638bc713fe3a84ebe53bd31cea4d71035b20101a4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBNRN0602503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a497f1b5b6a365ea64581b703858af09af599be5aa051722215253306670a8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBNRN0603403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01927c2b8bcdd55a6402ca2b53ac5fe912221affdb068092868404164f5e9d. 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/GBNRN0603404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527d09ed2f3f2f4fabb899254e8b1990ab292f3a03827cb1180dd82d2e168a6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBNRN0603405.
Kassi Kasse (Music From The Heart Of Mali's Griot Tradition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051ce17784b707d377276c2d466f306ff409eef675fa2d9f0010901d926dc60. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRUM70801080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb209e226510b32f7adc8732a10648fedf63d5dc221ee6518dc12fdffb33520. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR2W61400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79cfcf751415bcbcd166e0075fa5ac174afb942d7cf8b2a7731ae166aa0bea4. 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/DKXH72500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1fbc7db62b0b764a7e0283f8b128fdfb6784b48cd364945eb9942b541d4702. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DKXH72500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64caefbc033541b488f27b8de76157f0f9190a6dbecf9bcd6a1d39384908162. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DKXH72500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96ff5ac8f4ee3d12a8725b360da6a562248b49cf1cd7bb38b4055214689b439. 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/DKXH72500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86ed45418766a6da0496e5cefc30433efa37d22fb6c15fe2b71c4c33029a4e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DKXH72500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b8c7e386229a4458a4d5b1b51cb227083898791ebbe0697b3c327a13576ac8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DKXH72500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ca1854b1075d4246f8d583e783e89d4b1b8ab53dc8ee072ea1188042a52e9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DKXH72500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ded65181f38c1279f974f653e639abeefa1d0fb86dee3b1ea226fa53bb3b5a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBNRN1790469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e1d92270473e98fe9c39fd3449f9cbf04959eec2eea023c6f470403424f432. 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/QM4TW1732105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f9d45c15fca5984b81c04da288dff61d0630875f2e422b7d000cf676a36c5b. 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/QM4TW1732111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00670691659e8f35ee846feb89ac9c004cac04e027eee7dde97650d2bdfe1c1e. 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/QM4TW1732119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38ca6e930d5698671648dcf1316969863261e1b8c326f0ea381e51bfceeac0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM4TW1732128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6088daed244faed9222aa44130c08a212df044b4aced45b878fb7c2745095a2f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM4TW1732134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7596f8b8dc1eb9c01e2e2f42ebf93d649e7fd6b27bc43d57982cc29c92037ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW1732135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ded65181f38c1279f974f653e639abeefa1d0fb86dee3b1ea226fa53bb3b5a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBNRN1790469.