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 0xda754c9d764c80604ac804236283f4bbbfcf0c18a45f7fb8d8ddba9d8c9be5d4. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bce05dfb-8a83-479b-9699-35e60496b7cc.json and https://artists.proofprofile.net/proofs/artist/bce05dfb-8a83-479b-9699-35e60496b7cc.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 0xfa12a3293b092881d5bb97b269ddb8a37dbff2d43e63016fce8fb8717a271353. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZVEM2567231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0803de151b1547f35c097e3a765bddafae83bea9965cf225bf8a382ac54c22dd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZVEM2567226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e0060b32ebee29a2afe033f56fcee4c47fb24191aa2ca7e99ed3d31be5c2e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZVEM2567217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5941ef394f5b095276f3443ceb3d4467a0ec2ff2d0d9d5c68195f34b9990cab5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZVEM2567244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087c9f662732aca4212f0e20892e55750dc05aec0823d8451802891221475242. 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/QZVEM2567225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbe3f79cd02111ef0fdb63120d6fa813dee577bcc49ba08777d4bd509f526d5. 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/QZVEM2567233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c52f41d525a93d47386cd9f4c9c0eb34a3dbf969333f7b0a3ba0d4464ffdd7. 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/QZVEM2567237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c382b088f0c857d762912055b2f85ad19b97e02accc71b8b03e568c059c41. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZVEM2567220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35919cc4f87ca7423c0440bf8f3560664611ef08021b8e122ed7d2ca8daeed53. 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/QZVEM2567230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801556880c5c9efd7ed2b5e8103bd4ae83486411e0f6f5578acc955d2c6eb7c7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZVEM2567232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9dd78755c8e159718ab8823debe4db0045f3d0a36129fbd000a2caa6f5a63. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZVEM2567240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0119bae95714c452839616aebbefa62f573e7fe180d2bc153c69e2e21a6552d8. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZVEM2567223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f3388721675d0ef653f418f5b3d4a1d6dc4f5db1dfbcf6a1acc96e29c7705d. 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/QZVEM2567239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cc9733f3896bc369bd4446866a3ac57a08bd1988d1122b139c0f2ea660b864. 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/QT4K32551806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b778c8a7bba65d459a04a23887448deeae703ce8a674aedb810f05ba3065d1. 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/QT4K32551821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7df77385f39d5b67eae3af05d59c607d47ea378bddc8120c11a85ab9f51f7a. 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/QT4K32582633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739dd14e11cc6675c4534a854cec64e07409e04e02d68c3505b206e428ddf6ea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT4K32582654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3f15493db187e444939248c85b3459d61f55e1819948ee04d861404747e18. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QT4K32582657.
White Noise (External Cancelling) For Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3715c7b3c6c5a7e62fb438a38c2cccf46909d297807254e0e5fc5be77c962ae9. 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/QT4K32582658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76977dbc997302f3660a29276e5f60fd9902a7cdb4f77604edce8e1b13c077aa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K42596643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0cf9feb45e943da3f22d4350ce32825148ae857df134d6b80914c31b0f9eb1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT4K42596644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a09af3928430b52f02dc451bdd084066f4095be019d21829633cce0a242150. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT4K42596645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7990f4afb82a4ba1bee64a947e7b5c2f5cf58ccf482ba7d4350930410448cfe7. 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/QT4K42596646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c743725b7b5509230bcb65b6849a477c5baa60d29227ed37bdadb8b70f75df. 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/QT4K42596647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c786c6291221d3f16f4047a195b49da6bcbe10a5111acc04f6ffedc293b540. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT4K42596648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f43745511259991e71532e0e093aa1895bd056893c92062d55b2d8e2c46dd. 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/QT4K42596649.
Som de Fone de Ouvido com Cancelamento de Ruído
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6452f7b03ea841692d44bdaa5dc276152f1dd45c96e01f9b189c342f74d9c35. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QT4K42596650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4795dfd69e81f6ca88938483a2ceb7a9765cf197691e8df807900b39df22217. 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/QT4K42596651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2c11bb236a6d73b57ba9a90cfaa5a0fd8dbe87a32c45b4fba8de1a53e382e4. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QT4K42596652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9451a6e18a5047810a6860d205d3e5e0c6ece6db8060286adf4bc4382c8cb229. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QT4K42596653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a73692395792164ba3bffc77062b638c5ac976a950bb01d394fe4448556d2. 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/QT4K42596662.