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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595cdf6d9bdb6d5d86c1197f998328aca3253131ad720ebdcd38dc5ccc501409. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1909b18d-5acc-4d50-9af2-c7d633fdf8ec.json and https://artists.proofprofile.net/proofs/artist/1909b18d-5acc-4d50-9af2-c7d633fdf8ec.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4aa3473efc6494c31339ab54a9918c0306715312214ac58a4a9a8be984ea3e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:37Z), 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/DESR41800233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8bbd3124e861381f7b8d6aa9eec398f3e21ff946314503d3cc488c7d35dca3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEG932104526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a33e28dfc28aa816ebb86dda2395cd104a46ad37e07cc21fb9cc26de378d630. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CA5KR2237911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287eb031ece32296e5be2ba3a6ac83a76083df41beceec6f4c3cb1a1675861f8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2237912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a33e28dfc28aa816ebb86dda2395cd104a46ad37e07cc21fb9cc26de378d630. 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/CA5KR2237911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287eb031ece32296e5be2ba3a6ac83a76083df41beceec6f4c3cb1a1675861f8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CA5KR2237912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eea6fff336cc0042912b36e9951f2500b179ce5195907a529f1876d8674e96a. 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/GBJX32366874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a427c02b8752b7dbee77a1a2e76fa286fb4ad5ba3e616e9aac0e2ef39c1deb0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBKQU2365222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58806f6bd5ca9fa395f21ba995459f4e10b80c292e629190ca47aa7afcc873e0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2365223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9ca7b40ded46a57698ab3a532a16b64fd7c2eea7aab2d2f117d9d917c85a6d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NL8RL2318403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed66ee42d523b8bdfbb9bc4638829e7abd4a3004452bfd1cd87b3080519833. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBLV62413807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f90572a40b994614ddfc20ced0437ea40a5c68b9fa6a94807ce05ed0928ddc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2415363.
8 Cubed Remixes (Vol. 2) [Mark Broom / BEC Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1157103aeaa8dc0e68db17c0dc980d0d55b4b1d581348df530cdf93043ef5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJX32373015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741a460bd7f3ea00a5aaa347e4fe67205f90146c0b46734a84d60b7151600426. 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/GBLV62413786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a34adde468217264c01682b11bb490d60539be2750b5f07753e7db0c84da5c. 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/ES74F2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830762f93856e1def7dc7adf267ba96c0723744392e294c655640683d4f2f4d5. 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/ES74F2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaa4ae4ed68199755d33fc5c8251916f6748de31f2da56dc55f0e355d06ef3. 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/ES74F2500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b71ebb5201ca1ab2e694b1c671ac15b6d1e710d763118aaded538a054891668. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBUR61900132.
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 0x1ac5321eb877aa65928e8b8886f81cc7658fd0fe8a2577bcbfd2370ecf5b71da. 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/FR9W12101144.