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 0xe2eb5ee47c168e73f32f93b0699a84905933352c1b178e975f7bf6fb3856f819. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79ecff5e-9695-4240-8c14-e75200d205f5.json and https://artists.proofprofile.net/proofs/artist/79ecff5e-9695-4240-8c14-e75200d205f5.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 0x4e5d59c3cb3471c3450cadb9708ca7e339e254c8c30041254234627989bf1e1f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR9W10503298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733b428521c42bb88d6db99dca62f6f11947ac258289b9f8bc914a7d473a38d. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/FR9W10503300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f263fd5d9cf000300eb52fd510afd205209499a73bcc7075052870ecfc98096. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W10503301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed444337bd6fc15b5a4e0af79ef1f54c26bfd214557b9d701cd89c8b3154602. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR9W10503302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca526b6d68d918f8e2ea084cb3f494c09acbf5c807a40a47f8b69d4cff72cde. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR9W10503303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56c02564e5da01e14120b1658c3bb5b470860442eb76930918707d00b5a748d. 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/FR9W10503305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef39b38d598e3a4f938a76223c093fe5b5f28c41aca5abce23d2bd2138cef1a3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR9W10503306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0143351df7edbbed2ff32560fade66a0717d0d64ff03f58882af5d799f803c25. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:23:53Z), 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/FR6V80123256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9970921fb3b73fbafae85316a90d2578a5b183c6920ebdd4e6f82cb714f35. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:23Z), 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/FR6V80123257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850f515c7b290f97befbc34398c0a7c9e32a9f298165ef414c407414172a337. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:14Z), 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/FR6V80123259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2a338f0919a227ff3300544bf9b204d30763c3aa7aaa0648418080c2b4362. 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/FR6V80123260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0f33e3b9a89733156b0b63e7b574c3c2873a9b43da2af21ea426d27fa1612. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:56Z), 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/FR6V80123263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f9f65395183698845a8fce2eaf2fcc50c58d0b79097b6395092e1aac40227. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR2X41857778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dafe510fe27142fc6aa18c8ffb2e87ba499335dde1ba8c264634e11304a35e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X41857779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90de3e7dd6370c55da089f303c6d67bc6a2e65bc83442231659e5d16d5cdab9e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:37Z), 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/FR2X41857780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720312d6cd877657d83a182980db5136119e3d44e255d59fe9ef5876b82be7fa. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR2X41857781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea97325991cfd1b9d6a3fd18c0a85cc902cb3fe25fb3c87836a8e7355045a51. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR2X41857782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f9f65395183698845a8fce2eaf2fcc50c58d0b79097b6395092e1aac40227. 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/FR2X41857778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dafe510fe27142fc6aa18c8ffb2e87ba499335dde1ba8c264634e11304a35e. 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/FR2X41857779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90de3e7dd6370c55da089f303c6d67bc6a2e65bc83442231659e5d16d5cdab9e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR2X41857780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720312d6cd877657d83a182980db5136119e3d44e255d59fe9ef5876b82be7fa. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X41857781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea97325991cfd1b9d6a3fd18c0a85cc902cb3fe25fb3c87836a8e7355045a51. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:54:12Z), 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/FR2X41857782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409c5dff0dadfebcb6884dd11afa63ffe50db7ec0acab9c40cc9dfde4ba7649c. 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/FR2X41857785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e1fffbec12c202c685bc97e46437492e5b2d6b1a5aaadbc9ae14246cc50253. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:38Z), 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/FR2X41857789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae273dbbd45c5967fae4179628c5c122c6a4cdc714f713719529812e955cd2a7. 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/FR9W12123698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a07956987c38fa64ca12b896e167cbcb995d635c90446d5d7cf7004c17e7a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12222120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35970c95d3fe53808c44b7a77e51269d50e0c32e01afc14f1db6ae8cc3698952. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHC2303196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb313e2f26722580161f622839b8077f9896a70f3efee69474c6acb01fbff5924. 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/FR82S1500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18907b3e518ca67e4fc0e8877125dd4f4448240816ab406487728889b8337ee. 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/FR6V80631805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46932871d721d10aaba6abc39a4ab1c58f84f06098ea9e02e4272c0dc9e0a4e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR6V80198441.
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