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 0xf02c159a6ca08601f599fa0016df4f663b0676f255e4c990836a027e130a062c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ed1cb98-157c-44d9-bdf5-404aa0ce21b4.json and https://artists.proofprofile.net/proofs/artist/9ed1cb98-157c-44d9-bdf5-404aa0ce21b4.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 0x16f773d5960ccabc39ca4409d4b6e2f5d60276a45bde28d5e470ec143b6e3a7f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADM1839638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0084e1aee35dc37d901bcf6648bd22f326fe4dce95b27006a375a9662e3fb5b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:47Z), 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/FR2X41837374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb194162341206aec8afc66759c60b4d29f19638fd1f81225595ac2461eac44. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR59R1830372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e381335d7606a2f7049b2ba2e73a9be788ff32b366e3e49fe106ae14f14b38. 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/FRX201858964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3053e521a97cf79a68d2763d30ea1d0e173534601e031de8e078b0496934748f. 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/FR10S1944277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa735c9ca0962a46aa1f757b53064b9fc1e4552ddf58a17e96996ec97766e2df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S1978395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2def78be653d2613de47770ed94c22b4c3ff016aebab7dd5be50ecc4f8a5514. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR59R1903387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef38d13fbd5fe23c01d7530c6f7351f531a3c0b57e30b06c57c5f07457f61fe. 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/FR96X1982530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2c89a864e873d0a78de04654cebc677340acc7c99c8cae1b3c53a676067373. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX281927098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd101cf396a88659103b4096cf9736533594df60c8ec44baf622f6d425b3de6de. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:54Z), 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/FRX762007768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783902eb90d93effbf5e1752803476c1ce564cc404d761fe526b0d0f57935756. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:55Z), 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/FR2X42264577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed92552afc2e45ebab241e06d1760686d76013c6341e542d7df65e6bc21dfb8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR2X42264587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783902eb90d93effbf5e1752803476c1ce564cc404d761fe526b0d0f57935756. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:19Z), 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/FR2X42264577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0206509087d0193dd0d1f80d11373175f06081cd62ed137dd0b4a9d250801ae. 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/FR2X42264579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbb1d92cb1cfb2abf7b77de06c80164ef47d4e014daca18609abe0f01d80cc1. 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/FR2X42264585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d2d0510eb06cff7eac1160783cabdc7a7a972ed34f7ba44941448d9a4aa266. 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/FR2X42264583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc26d9249f93af3cfc4816f5d327f7ac0565f29a0403061b1d48047a7a19d52. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR2X42264584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b8e18f8dd773f3f01fc8b2b4372501049d305ba6c2db64074a711cab4d844. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42264581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95364fb347ffaa50a06e1d967a81ad714e96041cb1880b81bfb5ab619b746157. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR96X2315256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e28575aff971d4b845be3aa67c9112a63ecc25978e916df8bd8158b8cd797. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRX872397808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e67847e70d2854bbcc053f8061a28d49be4bdda955ceb3f47086a730a1b5b21. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FRX872397809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13fc3bed643bb159b0644b7ef28e0a75ec0be1ad45898080d40b504d432e7d3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FRX872397810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbca66a27ca450d6fdac9ddf5148af39b20499b7b97f83f132bee662273e834. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX872397811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8805ca43d07cbc815bad8b547e9781b0f19f73386fcc36584bb858241d2b6923. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/FRX872397812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88577710a9a4202f266f9e837cee19294d4d41a26a4e3ea7eb6a534f84130d3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FRX872397813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd3e70af9943a976507298a5b10195ad2a3ef5bce68c4fff21d176f298a4ec9. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRX872397814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc79b077f7f18d46e57d6932ebda9139218808fd533b5e554547fb765d003d8. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FRX872397815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6752dc67402bb743c8db5235d1dc1f8e9daacf5e2fb5ac88f121d5561b7a84ea. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:19Z), 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/FRX872397818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf4bd2c9250f56bfa86b6e03ad8f512f2dec706270125960c9dbb44de47e5fb. 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/FR10S2469263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9815140a1d53d953e13b2a1511a2c40e2ed6009e3ecd241daccddc14d82c1b7c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:41:07Z), 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/FR10S2469266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb52fd05d174ecc7f1e1a6a8fc3a6ecb0077937e5c10883cba05217d65195b3c. 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/DGA072469540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb48efe940175194b9b29893cf3552f3e17c50e57c977c20cb2f475aa6f7d94. 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/FRX762125255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435473148f159ab01f3935f328490e320b2ef9c2a347ed9da2ced62591a0c24a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8Y72100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb48efe940175194b9b29893cf3552f3e17c50e57c977c20cb2f475aa6f7d94. 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/FRX762125255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e784889df5fc1f5212a3fcf0a47fe490398155c0b8ea81153b4ee3d07dc542. 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/FRX762125261.
Manzana - Extrait de la compile Cercle Fermé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2d10bd16a3d42cd77f9ad7fcfe88e0482ae1608e221694ae73fa816bb25cde. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR7JC1800060.
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