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 0x6ba6523df8aceb3106cc87f9fab5e1d38a103bf843e6e83b2c649e4514c50c87. 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/b8b720ff-17dc-4d19-8c71-83ad3b402e91.json and https://artists.proofprofile.net/proofs/artist/b8b720ff-17dc-4d19-8c71-83ad3b402e91.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 0x4dbeb3ea315f7c27024c382fa5af02d65227fd0570ff00d99b8da6f1d9c7579c. 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/QMRSZ2002265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da120c543f3e426f218ad602ef910882e4a8698a39109d39cfa624bc44eb07b. 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/QMRSZ1902758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d041a938b74a099674f65322fabbccf42b56778b77340b90a3b44d3b6b05e2b. 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/QMRSZ1902764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee86beead08a0fc26e31ff59791868ef8b6d46aea7afead34c9c4afceab324bd. 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/QMRSZ1902767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66167c472871b0d86904ca644be43599f3debb4ea5de53bb5284900062613d74. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMRSZ1902768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c19c1673198847bf452ac2b94f13bab104dd20eaaea08f88b574811dccca998. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMRSZ2102750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849f1c5a0b36b33b8335b93d45fed7a69e5c7565f732bd745a9e0e33096b6e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMRSZ2102753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756ba93bf84fa271f1eb6f3dcade730cf32b6c927c9bb483a0e845d44299841. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QMRSZ2102755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8866c19035b9fd2ce010ed192a72e81a19f49819e411962d17703d1fa413dde. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QMRSZ2102756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa28b4fc8d66c9e9562c979a7ddf21e4263b7d7a7f241897a34675c2f8e2def. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMRSZ2102757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf29b43a8bb08f73899cedcd7216614da91b405232ef35c3cf35e9c684746c6f. 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/QMRSZ2102758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed381071f63950fdc556d4eeda0efb76e8a9744c62841bdc8d6bc5d2cbf2437. 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/QMRSZ2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8a745c6a8bcae9d9dbdfef45487c2d6cd1332ed3fc701e264252afef3a734. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMRSZ2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0846cfeccef6ac3455acd14d2a0ec549a4fb7e74cd828f26f55b3845a812852. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMRSZ2400028.
Hell Or High Water (feat. Lucinda Williams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c9a94a4a719104f29b5faf4e6b0d0dd685e8a34b36fba150dccf5f41494c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMRSZ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59af83f55badc5cb308fe52984a4f679212c96f26857d1f87779ed2e0ea5a008. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMRSZ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f59e5c99021fa0fc3e1b2bc6a52e75c05b64a088d672f381a66911a2bba6fb. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QMRSZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9afc62f0795dd68d246fb9a5843409632a68f12f211a828bded42396eec1af. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QMRSZ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223029e0cb591ea75f37f5f8d9dfeff2f371666e3cb770386ffa1eff58afde4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMRSZ2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aac45402a693755053d78fafc00f076ded178f3230c3cd632d48027145c31f. 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/QMRSZ2400035.