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 0x06b33a0173be7ecfeceeda96ec5d4f0b8b2e901377ef5df71f3bad8679e80b7f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0321e58-44b2-4d2e-9797-0fc6e6e46d84.json and https://artists.proofprofile.net/proofs/artist/f0321e58-44b2-4d2e-9797-0fc6e6e46d84.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 0x5fc0ce13a9f390c80879e147c6d361886c92a76579084d2d01766210e38948cd. 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/GBMA22424349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e5349991f5c13ef58da03e851e54999309a62e80ae9ab4c455d7de4798bfad. 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/GBMA22424333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d58ed574493a27440f7baa7221d6acfdea7db9558acc0b3d385f4f5c0af5e9. 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/GBMA22423931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30b32d587b991a5ac0f65170983d3ace5c7d78170ccfe4cdc860a3b4e1457fc. 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/GBMA22424351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce3a25a77d25e873fc683e3e1039ceeabb6f8b46dc7d6676dd528fe9d902381. 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/GBMA22425881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf75ac7da733ec45b9aa1ffddb95f6f82749fc390829ef4d9d46a275a1c1245. 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/GBMA22426671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5028423f1613b54e02af547f3bdb41df8bcd8aeb6afbbb87f6fdbdd37071e9d9. 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/GBMA22425880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c1f52201528d8f463a8989a933d73442489c8e51bc9479e93d367ad6e01ef1. 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/GBMA22425774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41269a9df80469a6ae3d9ec0b6370cccc061edda3129c66948ff859cd3c4723d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GX53U2468896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065bb323c0a19cc6b82ce7952e1465740d590e9fb3ba5d6253ff8b9a6c9b2e4. 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/GX53U2468897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea36f2d7814a45b4830f4a6366231ccd3fd8a38664c516bd4cff80b0519dcb48. 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/GX53U2468905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580015eaf0bef5d652fac170a8352c5cc28aaf29f8c2f0240ebaef1e7a843b6. 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/GX53U2468908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cca289901eb73efa49bcd77c377939246d394ec01a0539fac3205e99e86ed0. 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/GX53U2468910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac66d9fc740449f5a33a20cb3c5fc7da57eefc273cd6da57ba5a399b0f1de66. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GX53U2468911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a084fa13afaf88c65cf8a0cce27231e7779d06edcd347f62cedbcda813a72. 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/GX53U2477516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f968bff3cebc80969a109e37d2373f4d08a0e2d86f7fc5e852a6f7e66ecc18b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX53U2477517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6252ede22761333f43272c6e3bca7b6ac9e32c4640e051de983367fd0482842e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GX53U2477518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7e075996f1d76e1e3137a4df141bc2b8282ac67427167ffe82feed8a17627b. 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/GX53U2477519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a19cca8ca3599f32c68baf1c7107e67a498f2581c341dc142d8f0d52753a1d. 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/GX53U2477523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe431b6b881b2a3c329fb325696975da1acbebe2f7e5026da9597067f45791328. 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/GX53U2477524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324e52ec63e61280a79e75dbe90a8baf6b5f0ddb9dedaabbf7ae636a87f9994. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZQAY2562555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6dc40a85129b702e4bc2ee17c215811d5d112692309064b0634add91f05832. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZQAY2517377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9077c067033f886025285a5ba0c02aa764362439656ce0140deb42fcdd10fe8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZQAY2520744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3d07a6c67450e65b48e5330790b421213d6c8605d3c58910175a53fd953331. 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/QZQAY2517684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb75f98e4bb8074de3ef8f0e9a2498459d4e41921ecc88aecb4f7338871d2fa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTLA2509208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d2bad4279c2fc82bf40bbd475df395511d4d4a369b17bc92cb1e258fdf1a4. 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/QZTLA2539130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed875fab3adef5941b7afa681924fc0bed32cfb872058a9a2db1432291feb5f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTLA2527274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5f8b37daf1142ab138e7c148f04652f5bd0acc246f9585ca1407441adb0d29. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZQAY2502547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50732d4d1ed4b4e23ab7c88bafe16d1168a4cf121fe143ca54f895e61c047cf5. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZSYP2532848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13614e7444bec8eff6e216434d615063786494f6aba0bc6ce67f0cf9a341771a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTLA2592755.