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 0xeb7541a5a771c115aca5f4eca4630fbe2664b859838c6e2af5ab81990e5aa523. 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/7dd60d15-2695-46eb-8c13-f4d4d62bee8b.json and https://artists.proofprofile.net/proofs/artist/7dd60d15-2695-46eb-8c13-f4d4d62bee8b.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 0x22885d57f8f48c73e54c49426b253307b0dae1862b2b2d8e3b3fbe75d693b2d1. 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/TCADH1788905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bb7ede20f9aed4f689bbfedb06ab5cf797165bd2147d1c302b211b27e27961. 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/TCADH1788908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ba41223b1359537fa21371884104d76ed447b3f8735370951396bb74dbbc0. 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/TCADH1788911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc59d93e301831d9064ec373fa917f26779a6cf2454db9b0ac4043666f49aa. 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/TCADH1788915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37edffcee94bf9e2f30abb5ffd20e2cac7981c60252cf57cb594ce4eed33dded. 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/TCADH1788920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccfd8bf33d09547e6e9e7fc04d84d23a869fa5822d624701b4c7c4e53c65576. 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/TCADH1788921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3780c43231c55476e779cc441bd0ad4cf3deaa326fed1f1bffd00700cf7aaa89. 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/TCADH1788922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2837c4f9a76a187c901eed3a3e53e079509304ef9fbdd9e6cc2f793f5bda9. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCADH1788928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f15f5367fd336a1147e1462093e3d266a247ae985e0852abaa047f304841c. 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/TCAEE1925420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7385e482e7c8ff7cde0b69ab5dba1c59455dd4da667a27b591c74e521bbde673. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAEN1960267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7adb7f28e68aafe99f1030b5d30704f43a40d6aedef0b79bf413abed87a1a7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAFC2029523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2ef7ea57d2dad6a4d686273fad0148e92a9ea9f9c2bccbc08ec55d01f59d2a. 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/TCAFC2029653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49653973b076fbb59313ec237b6f6fbd7ef15f96fce5b5bd6dccb1f1df821b32. 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/TCAFC2029668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cce6b9860a71e74907c2d849ef5a2add967dd7b0d7d25c885a721542cbce411. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAFY2119814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb12f5a1d6b131bdb509289632f242def9d5b1cc4408f50fd5cf6e49d8bdb7b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAGL2248808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da22f245d32c4c02df00d900d5256a9073e2daff6af45ac5f1b197d0392341. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAHB2327748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c515258ab51388fcbb1d19804ad896bd6ccf043e3504cd76e71752e4148997. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHB2327754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f39c48148060079fa2811119e75fe7d53cf654d202482ec2363f1ad329178c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJJ2521835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2a43cf764a2d387075856a2d2aab072c6bf3435908a48f9a2d013639b1f037. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJJ2521875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc950e88f816f873167208eade4230d0de305bf546ce0e3fcf8e194b6a09dbc6. 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/TCAJJ2521974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0996ff59d96605e60e8bff430c21f12d5543f51fa454ec785cd3f6733ac43b9. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJJ2522098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c939c2e2fa5a612d49ca64b443d0cdf7e48bce93fe87271ba39f9535deeb7. 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/TCAJJ2538695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2b0e4e6103b61b5d0f58bdbc0b57af8f8744f33726b56b0480cd5da8bce64. 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/TCAJJ2538829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50d7b620a423ddfd9a33ed267c1bb5f1115abb947e55e73575bc10e68f12ef. 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/TCAJJ2538874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237a02975abe777ae5dcc9df036fbb5927738b65e90feddefca3ac19a0c935a. 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/TCAJJ2538930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e9771cc286ba3546750eefa9032a46e871ff5f7195c84a7a4e4bef5a819c25. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCAJJ2538998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a16e651de3907e5e9714d34638bcddd44fec3418cdbfe87821c7082d980f0e. 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/TCAJJ2539029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c939c2e2fa5a612d49ca64b443d0cdf7e48bce93fe87271ba39f9535deeb7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJJ2538695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc2b0e4e6103b61b5d0f58bdbc0b57af8f8744f33726b56b0480cd5da8bce64. 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/TCAJJ2538829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50d7b620a423ddfd9a33ed267c1bb5f1115abb947e55e73575bc10e68f12ef. 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/TCAJJ2538874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237a02975abe777ae5dcc9df036fbb5927738b65e90feddefca3ac19a0c935a. 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/TCAJJ2538930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e9771cc286ba3546750eefa9032a46e871ff5f7195c84a7a4e4bef5a819c25. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJJ2538998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318228f58e226716f42961a9dafd369e7f3d86dec455cb8f37e31cda03b6f6f5. 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/QMDPP1900991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5e9c340cde48357682f4432716f0a031d15bc7fbe96cea8e2bad1e31fa6be9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDPP1901028.