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 0x64525163c65d64d5a96dadf3bf1ff80b4456898e6d1b8b18f3812cbdfa9f607e. 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/4b7cb54f-63db-42c2-9900-d53c62cafbd6.json and https://artists.proofprofile.net/proofs/artist/4b7cb54f-63db-42c2-9900-d53c62cafbd6.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 0xbf04c1321a26206175138fb2fb018f4909a5b29fa20bd3ecba5e4613829d02e4. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/DGA052000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c5bc18c9766055550f5efd8712853b2427f005690d56ed5f1cec395db32ff. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CNF181600144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38f132a8ba0365e1ed208027520f7762febe1b8a88971bd24b9b2207a145a95. 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/CNF181600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb4e0dc0373e1f5f47bcff30c3d09615f6c3cabd502f38a7557a18373b828aa. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CNF181600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590e37c243ac63f92e52544dd05c742294282651c192301c8ab3a95a10a69239. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:25Z), 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/CNF181600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf205fe7ec6b08dafa1f770d242d913dbea7b857cd30f2ffb65ae245bf1275. 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/CNF181600149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7ed29815443356ff57ebe3e555cbd2f3649bb249fc71b88632c364b216da15. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CNF181600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c039758f9812c073c60e12d3385481e938bd5805304a2c04fef1600d6150e4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CNF181600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb61babf99272494f777ef6a91701a53fbf753e5e2abb20f878dc3bfde16ab. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CNF181600153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f200b4b560dcde3688c144ea44bbcd78b54b261e59dfa2dd5af148cd54c990. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CNF181600155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b22e1b12cb209e1bce79824932f23806414c870de23819535cdcc0aef2612d7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:35Z), 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/CNF181600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d34c42a0398374089791603cdd0b2c7fbc747b0f0e3b811292f0e13731daf7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX282182336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332f794e21c9a6e343b792ee969265d05c73f21fef27f60518205efe9be6b22. 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/FRX282182341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b33f69fe72a14c1d62bcc8a469de0aeab26dcebe617cfc345867fc0384ef47. 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/FRX282182342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b3430bc07377a04cd0579ea9a667b158774cd838cc35294c0cb8e5bd5ff26. 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/FRX282182345.
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