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 0x89fa4ac70ecd13a7c6e9d6f0178f8e7a13dc214495682dcc92d08716397e3e8d. 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/60ac6a3a-c09a-479f-be7f-649e57701f85.json and https://artists.proofprofile.net/proofs/artist/60ac6a3a-c09a-479f-be7f-649e57701f85.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 0xc3653b7a90b496daebce9b5d6ce7807d9c52ab79ad948d27fb615b7620eb8abc. 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/AUMEV2331446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c681fba9fb0c82d6ab0b021303f824957d7d741dc2397e4c6c7103049ffb34. 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/AUMEV2350909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab6e1e092bcad266262ebc61fcd636427018e2fe69e4459545e711fd533c22. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/AUMEV2350910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef294f5d579f321bd5144d220d50e7a62bb5411e3d0f0a41fc84b62a199888ec. 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/AUMEV2350912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf665fa96b3a1cbd78358f35d69a5d2ee80bf4c9e43f81e0fdfcad0468520dce4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMEV2369351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14494aa1edac3e2c21d6ac6412562b138940fbd3f1dac087e2235c7b50432e4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:33Z), 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/AUMEV2369360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f04fab766471c929ec83882a9a39665fb847210075fd5877fd595431441b6d. 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/AUGBT2323135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf79751c99ec7b3506b8b60027e0f9df3543a89a0b50e601f1ae814c33c7378. 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/AUGBT2323136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b57c7f60da42945fd32b0fe4bf2a4f50394bfdf3285294504a5738ebfad61. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/AUGBT2323139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb673b66d564313c547ae78f60fbda2823293998fbe4bf5af40b214a0ed6e75c. 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/AUGBT2323140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c965e953a9b07a504a72bda8b7fa8559af35a4e6ff071222525b140678b9e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AUGBT2323142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27a221c1851ab64420bd12670facecb0df517c9867a768fc00ed609e03a04e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:45Z), 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/AUGBT2323143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47128467b89fd7f2fd1516d98710bdc4ade0d6e56fb4a9cc5d6cb928a81d91af. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUMEV2401194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3a1b55f074d73b321bfa8b163d2e660d5174a541b5371a8ce7317e520308cf. 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/AUMEV2401199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1da965c3515f1e6844ef342cf56cbd6538097859413b04f5b3ed00278aa5a8. 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/AUMEV2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe4518183c3ee11ac91097baf9c0524efd01884caa0ed1044f8d490b3944ad. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/AUMEV2401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef40dd38ca67215ebc621d7319a1e04b10b98e0620876544e73d16359fefdb4a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:38:49Z), 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/AUMEV2401207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d5171c3f5e26a1aa83c21a16bf616d83cbddc25cc6a016549a1f9614e6f6e. 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/AUMEV2469144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7772135394773f1e0e1740a17c1533683e043881d6cdeadd6e48a5a4bea619. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:18Z), 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/AUMEV2469148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a936566a0d812dd3ffc6777ac42536b8d15285fc81d207fe8a7d0dfe177a1. 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/AUMEV2469149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa078b8c889905ca88424af5afb6d4d7e04ba8c2ef4304d4f7a7074c6e1a8fc41. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUMEV2517760.