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 0x5ecf7059cfd79fd51b996835684e4f2e4c8de1d0313c9d297d608368f4e44049. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56859c40-b6d9-4731-a56a-7a3526844ae1.json and https://artists.proofprofile.net/proofs/artist/56859c40-b6d9-4731-a56a-7a3526844ae1.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 0x9e5e4057bfeb6135d4f9ddb1ec8fd0f5e3ad78304c877727582a2bc808382df9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X31600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d207841164816ab952acf0fc8eac71a7f3edf7ce63afb7a11a9cbc5cf4d3f4. 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/FR2X31600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58e7f65eba5ba7f25fdaa7c6c054dc7e4fd544a2e345c22fe0ff9ffd9f043ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X31600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1bb21d82d213764915f642ec36977862308ece7cdaa12ef7a6c923db060e6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:37:01Z), 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/FR2X31600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0eca989933394491bd6df6b57218016e8961f2d9af45fa47ebedc6a62c1e48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X31600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d526c1dcc68b9ffc310f9b93eb8135895d19bc358350f588b7182bbed5af366. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:20Z), 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/FR2X31600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501a366280a3d8ef34e125eff54c2e9c9b2dfe36c5e3dcb84bdf6fc77437bfe5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X31600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f861fc77a6d2e61f1f02b088fdb099a9879349b0eb04524e45ae2c62e61ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:28Z), 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/FR2X31600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af7faa9497a05c9a7ebad75698c30dc626ef47424d0e8310a2235a023f95bb6. 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/FR2X31600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d42a405a0e68c07b13b7af2b20828f4822d9712367ace59d30049a4aa25b7e3. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR2X31600015.
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 0x163f34102542b0c28f209fa518b3fa83f21d92d50afc3719dca4542ce9c9ed2f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR2X31600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f720f35bac20f3553251d14596a2dbb231feea4f078717ad71b52a88f1ab36. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR2X31600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bdaa351910286382f0bab271c86b0e76e48f9a65e3ab02356e8feefd006492. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR2X31600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317cc909d3c026fe8a04516d087333f3382ae8fb790e1f6f0de5cb660f2b2cef. 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/FR6V80718203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601b08f32bbfddc4df53710b9ee2670290273ab139727efee99bd5ee9ac0ad62. 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/FR6V80718204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed7c728347a81ec571a8b70bd508578c34cbc71b9b47faf245e76a2345db4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR3T02100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208d4fe38f1dcf604b44c25d25a5cfea9d9ddf1195129a0f98396ea4bb8b084. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR3T02100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598fdf8d0cf5848db416599c912776beac1ebe764adf1430d77444ff3d8bd62b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR3T02100024.