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 0xb1fc426829647687cf29a571820c6e339c9aaa557b6923d0e58929df0642eccb. 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/8f955ab7-b619-499d-92e1-798167ecf1a2.json and https://artists.proofprofile.net/proofs/artist/8f955ab7-b619-499d-92e1-798167ecf1a2.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 0x99ff7f69b53cceb1d85964b1c12633f640537a312a65714b24a4a7792f95638a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:00Z), 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/CAT500352801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32181b8c0f878a1d0b6ab57b1b3adb65ad1b720f384dc9c745a95dac5010c278. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/CAT500352802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2e8f6e7fcdf1db9e0978cf88beecd1d854069c8d8d27d0da055768fc535ee. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:47:24Z), 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/CAT500352803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f8d5fd2fa7cb2025ba1bae184d78723c0f6a0d4e82c78f8e5828da35c396b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CAT500352808.
Les Aimants - 20e anniversaire (Bande sonore originale du film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239f512beed3817e808ea20d470cff6cbb0513289f2e863fc35a2d885b8cf8ca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:15:37Z), 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/CAT500654401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfc68219948c49aac5816c38ad7170eb60dd4d107302661512d54feba6eeeda. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:35Z), 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/CAT500654403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112813c557d645f7d402b339ddc86a8948e289ea44bd4df43d0dd8205c15a39f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAT500654412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0327d412fc481fe72a92c5438fbe95c0102d513134c55caafb6bc05a78633ff3. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/CAL540910807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa9f1a206dc9dd5c45df6ad93ace3320d44fe71e4452f8b6cba6af4a12e4b8c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CAL541416201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe602190a37e0ccaec04e4b9f9db27486ab5d9b2563a5518c4d7deb3c2bc309c6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAL541416204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bdcb762089bf90b78d384debbebba7d626a073b780906f28bfdcdca244cda1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:09Z), 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/CAL541416206.
Les compteurs à zéro (Bande originale du film "Ça sent la coupe")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df262804915a79b9ee0cab32c397c53942334591659e30f8e48a0366aa43c71. 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/CAL541718802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb21ebc7baa7e77f94b77aba2c728d881b8e473152acc99780c52b9bcaa9990. 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/CAL541718803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974603ad464e62aae9bf8b99d4b5387a08fccf60cb7ae5d706190b5a30f2155a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CAL541718804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9463226d5dbebf63aed8278926f67e7aa759c43f09834dae2363a2e93730602a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:08Z), 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/CAL541718811.
Vol en éclats (Le cours des jours Live 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea7554110821288ef56153349e560197bfce218310a7be9d106475cc0032b6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CAL542223401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c888d97920990df2731bc0b915e981285330f1ab5ee0e72eccfdb93faee98e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:56:55Z), 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/CAL542223402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c877bdc8f34c318bef9e7d2d08bb8c0afd936becebf46cad7958cf77c0c7060. 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/CAL542223404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b4d50d49bc0e76628e278bc2690afbfc1f8bb27247f0f612784b562bcd88a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:20:36Z), 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/CAL542223405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e46310cf63122284659ff3d0b906ac5f6431ab6a8632757e46c1a25480ee5a4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CAL542424408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e274d5c8da50b70443afcdc1ec37773c2c9db6fd98fe39e226f549d311525f3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAL542424401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dcdebd41a08a8906b3994f90eb05659d86dda2a8b4cbc5e3856827860537a8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAL542424403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e406c50c3828d2e962f45cd59945756d4612c25cd400bbfb061a67de011773. 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/CAL542424406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c00d0428d4215f45dfc01531d2cf1bfde5a422e2d22420a246bfe39f960526. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAL542424407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e986d0659babe87dcdbe8211ecd5c689f6881ce08b0f5069e7dbfd368ecd29. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CAL542424409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab16338a9bf8ff5a56cb564fe8fc62bc7774060130e451b528d721f5eac8c4a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CAL542525405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ef1a7d71b95b74c67ee198b4aa4c0f3f6bd1f176a992816b58b5ca1f40df4a. 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/CAEB61600503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71c5b0be30d071c5e500f82182c8c9029a519d8bc891e10765c5a503eaadd41. 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/CAHLG1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597fbeb521285f7fba88a13fda4d7f612aa3874a91b35cbad4334a769a2c622f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAF420900358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0629bfd8234390e1fba4a28033920434ac7f596fc05a18e4300ed8fea6c0cad9. 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/CAZ521733113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a4e26ed0aa51e9f91cf2ee7ef16173c5a6b7331a697eae9d90067ec6084a8d. 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/CAZ521733115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3ea84a821a59315fde9607057203ad4317a7b3d09779a8a6bc79d551ee51b2. 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/CAGHF2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e60b63a15bfb45a7d3c169c3e7cf3cfdb6d782f7f2293bd9851fde180125818. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CAF701464246.
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 0x6ba5929bc24f4cc858107d4d35ffec97336a00bb401969380a0c5a55d2347ed9. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CAZ521733112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04da5109c9b6e482e4cf0dd519d3fb97bc39ca5c4392328465049058006dcf02. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CAZ521733114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64eddb445a4120b1b2a92c3eb6c6d84ed652692814b4f067d02870a3b0c1db. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAL541718002.