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 0x65c72dfcd9b9659e132b60132c49f8132eb636ccf7599d7c565bcdd3f4f9868e. 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/0861990f-3b7a-4bc7-9c06-f168aab0ad35.json and https://artists.proofprofile.net/proofs/artist/0861990f-3b7a-4bc7-9c06-f168aab0ad35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cafe Bossa Brazil Vol. 5: Bossa Nova Lounge Compilation
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 0x78f4f63f8700d38dbfcf8ba5958ef562bb427ad9b9eab7035d543d5b078b3cdc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US6R21388542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685717631e265de06d16f7aa470a4ada20d9b95ce61ecf13940fb4dec376b8c1. 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/US6R21388543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4fe1198954950703d009fa7000b03c00155fd5fb8f53b35a1bd856e49bfcc2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US6R21388544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b54dbecec880ea6a3d367ad0de3aa15c7a7cf40813d0e9e5819d97d77b31a4. 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/US6R21388545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675bad033346d3eef8934b353e4abfedbb6b39b2e300d9b13fc54104d21b34e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US6R21388546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ebcd4e59855c4dfdd67ace6343a9da336617950e8bb1f11e7608dc96ef12f5. 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/US6R21388547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d26ec7f575e19cc3e0cbeff7b22fa876a700cef7b8337e8db613af0b9e8d2ba. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US6R21388548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903d38e8ac9e6602a9a40b0429ec70d2697ef7cd009808278d27001dd18967cf. 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/US6R21388550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768df12a3772a939bca8ea764c9b489e8e743a607920f42361bd63ad316e771c. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/US6R21388551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8366c956f3b862acbb990c55c4c8d852ea6d4b974b8804b09ec46b372e9333. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US6R21388552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52cd98ae84f6fc4da8489ae7209c95b46f06941a247fc548d6f87b35d16f025. 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/US6R21388553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147c4912346c574cde8e2cbf004d88f6e40d1687dca67cf0b2369be3bb103b15. 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/US6R21388555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f0c52f49bbfd2a3d0d3ab8b49291d33752b3e634191530ce81f08d3b4a678. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US6R21388556.
Cafe Bossa Brazil Vol.6. Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa023e0a908e299ca44a5423e8adebef3051c95706eb52ef02747a07b48f1a. 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/GBRBE0786338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fc1ca1444c28ee4bf5aa35a6e2d84dd48bf96515d238e5c11b0214cbb92b56. 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/GBRBE0786333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8794749494324719cf43ab3ee84c96df2328242b1269261e777ba64d652915c1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBRBE0786344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c452d342b21292975a04682239f358dcb38525aa5cbe03bfcb890dcd6eabb69. 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/GBRBE0786339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bfb21acd5169ec5e3991de7adc9b1590bf4b039ec2e7c214a3115c7a3d8d4e. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GBRBE0786342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bca829036e9cc7be0355e177573d787be5cfdd1d9b355e48a5574c3df98807. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBRBE0786337.
Set the Fire to the Rain (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2debb4c50c771d9828f0a521759a6f1f4d85ed0c34081766a99dd9a0986ccde. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBRBE0786334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15ef164315d98ee0872e590b093fd28a38793bdaea65f6b41a8cd5bf9f33e2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBRBE0786341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd4e772219ab13188bff85985a545014e73c4336069430ca5dfc89e1510d37. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBRBE0786336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95e2232c11e3fc540d427ae43b7259c70fcbe609f496b414cbd304db46c8431. 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/GBRBE0786345.
What Makes You Beautiful (Bossa Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d95752b525ed0e63189c8d2d7044f31400538d894e6a88a4a84b9adb788ec5a. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GBRBE0786340.
Cafe Bossa Brazil Vol. 8. Bossa Nova Lounge Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b43d633b3a27113ad234bea055d2f005170e4ce8d15fbe5b26990fbe2d568fa. 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/USV351455158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71a70b2d79cb2fc4c80cdf3cc32c555049db607ee7345395e64898fc4fd079. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USV351455163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3bf9d266a30207d37069fa10876c28cdb90dc24ac4c496300a4cff92852328. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USV351455170.