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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0bbc118e5b20f56ddf6a219d323f60ae2288e8b361530d47e5eaf2516d72a0. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/563783d7-43f6-45eb-a552-a4d91364271c.json and https://artists.proofprofile.net/proofs/artist/563783d7-43f6-45eb-a552-a4d91364271c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e9f6beb9af162a9460c32a30b32ab44ae34590d2132f1bd955d24a9fe5777c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKKM0600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7dad3bf06b1d47398b8277286444bb6672ef35f753d2f38c496bd677f76484. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKKM0600089.
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 0x16d9d54e11c92f9740fe0dbadf647ae86a63514d223e54de438cbeba80429707. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKKM0600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb71f3f6b799a852c699700011b79caa821a1dd3044b06a1b67686a5e76a9996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKKM0600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf921fccbfe50954008d8616d81e903ce4f3629017e10ed1e29118b380a9f37fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKKM0600115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f69c21426fc9e4e1c31e843b7f91c42c438d881fdd87aa0926d6927080b1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKKM0600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76e3ed3690bc67679926da6fd3b8ba179aab73a894707447660224ce561a4f. 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/GBKKM0600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef2ac819a64fabc11f6ccdf45f91c846627a531c6156610ef7e2f64416ebaa6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBKKM0600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4043c213bb2a7d83f3760b000ebbefa8c6a31b88908ab1536c9e9f7bcff1388. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKKM0600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3275ae768726f75bbd198be742f9b961eac2b6cbcbcbaada3b67b160382209. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBKKM0600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8694cc98e4f379d538e758400befcd908d71144656861c04b553f64d697fd30f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBKKM0600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6a91df0dd41159f3c39c27090e34e2e897777eca4259226beb1c4e16e7ab45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKKM0600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f1ff74afae7c8590e22ab9e6398c94a1b9bbfa0de1d6f125e7bae2a1ed20b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKKM0600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbff6b3f2a27ef05f3a67eb93f50e8dc19156ddd9fc590390d136a9efa3acb2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKKM0600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2152d99e8b6b34cc918d6cf612b1ddc3382ee81144cc998f02a0f632b398f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKKM0600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819377befa43d20debb6cf4f1a45c0c2eefa131fbf9bce8b24fc8e2ec16697b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKKM0600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83eec92f1937b76bfeb4b3a8f5dcf62a20cd6f283ee79d6bac46035418dc0e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKKM0600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7309c00539ede14cb7aa9374da0287df00b126a558bd1b93039869a82dad05. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBKKM0600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ee28db16f13bb457566ba221c90f8f66a1a8a31f72665adef2276db2a20628. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBKKM0600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3afc59af724f0fb6a902adb07ba594bf0f054c43406ecb8cd3f766e790f90e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBBKU0000171.