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 0x7788b76ebd0ae383be764ec651479b6b3058f412eb136badb9ba8ba7b9bf140d. 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/361db00d-06ef-4ef8-888a-663de8f7aea6.json and https://artists.proofprofile.net/proofs/artist/361db00d-06ef-4ef8-888a-663de8f7aea6.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 0xdade97b0a7a1654705b70855350440535f2b7bdb8acd62401628fedba6307e41. 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/TCADC1721548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960b695c3d727497d2593e70b50ea3eb47d8e8446a98c29486eafd53a7fe53a. 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/TCADQ1871031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1605457925a3f33411dde0c37e464d4d03a8d9c3378beb65b22306a1561fc8. 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/TCADQ1871033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0643e10bfd9813356c64bc2312c9e832a69ea066960abca18a1572cdfa1b138. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADQ1871034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcc4d49aec19b867c11de4c7c0ad41fdb561f71029d120d457724406e7281ef. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCADQ1871036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffa7a7d6c3ba060290454aabd84a6fdf00efef075e545f57ce8e2de4ef1ee39. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCADQ1871037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4f3ef7208b18a5c1fa1ce2da5ce6f117063256626560ec2aadb03393e8c33. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCADQ1871040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90cd3ce1c35a39cf0a6769d98cdc58981c168c1e5aed5b2c32e98b345fa5d13. 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/TCADQ1871041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09053581f9c38093b359c4fd92c98088c20995c9ab8f200ffa0cf349348ee547. 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/TCADQ1871042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a2eff8f1d3eca963d929a9e5b6ca1285599a03af4e904f7b4c2f66c6c289a8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAFB2038949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece709e91ea82e8f5a8f2276452b38ffc49310e32f984f02615fa64577e6dd47. 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/TCAFB2038957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cde7df6ccc2e21594ddd0e6564290575fdd3dfdd868d9a38735cbee146d1f4. 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/TCAFB2038958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1774e7c6b05ee37fdbd35e93e84bca9e868f634e4cfd450b73988b03be1ef9b5. 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/TCAFB2038963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62923bb6d0112c604882519aeca8317f27e0e63bab3ef5ab0c2e26febad2616. 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/TCAFB2038966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fbe4214f96987e9ffce717c5a39605b711072138b466956602ea0966a21046. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/TCAFB2038969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5db49200383e34ef90cfc2948a7120016ae6cb73ac6a457c495493d91a5c1d. 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/TCAFB2038972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7d6d4a9bf56b92352cda0323d57eddccfc2b826a1a29cd1f15119c94b5fadb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAFB2038976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308eb486b5ec3828e31477f4eb89d724ac7283365f3dcc8c7381ee7af90340bc. 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/TCAFB2038979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cb5c75dab8b71a8955681c5c75c79c2f53d980a209b3a7e32962d10a8c49c1. 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/TCAFB2038980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2068e1020fd47cd7b0e13ef492109f67feba9a33525ccac8860e712b6873bc57. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAIH2478057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b421dd9475e378d3104b9fb7861c5222c784ad37d26be4664802993ab5d63b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIZ2416769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a6538ec2879853830d2e156258a434db7acbfb0e667f6a81cafa92be488db1. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAIZ2416781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1632e268a099b209f0e55487cd293db7846a643288e9c713f8a22ab06eeb5b0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIZ2416783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351094b06554aab0c14bd52e3ba8d188d031cd9e904e672ef38346812ae9b29e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAIZ2416797.