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 0x6437fbf6f5ac59d241faba336a232d20ffeffc9e7b6d978e2d91e3304fbc52f5. 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/3e030366-7192-4799-b2cd-bb7d9a6239d2.json and https://artists.proofprofile.net/proofs/artist/3e030366-7192-4799-b2cd-bb7d9a6239d2.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 0x0f0e6ab8631e6bb4a917785d0d9ff03df236add65949b73e8c77141e39ca6ca5. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/ARF109901230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4ea176a7919839934f3996e28c42a883a88a1f8cb2e4945ef86e49d646df31. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:17Z), 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/ARF109901232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c54bf32a7d4d890eea00407cfb132edcf46c5511c2803bbe950bf4b1f8952. 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/ARF109901235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078533f99563bc6a4d4fa2b6b435ab1871e32c314f2772e7734f6145f16e56ba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:34Z), 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/FRY629225030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d73791e5e6a7f68a25b06fc62be75fea78fcec15cdcfdbf018f827730507821. 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/FRY629525248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c5bf81e9e0c733045103487db799a06c11b17edea49accf89243faab0a1375. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRY629525250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2128491de3f597480cd41bb82a303c377d8ac7b2754eeeae5f775368d26e9d15. 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/FRY629525251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7475db32562ea5d516fc855bb68f1bf76160a32645b4023880896f9887a45a12. 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/FRX199504732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a54be06617d96f512d7bfafcf2f0a62fd24920d313ed117c66e0ead966a393a. 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/FRX199504734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad5a92db78e0fcffcaba74438a3de07c066d850b90821a641aec09b0e34157. 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/FRX199504740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346e15dffe4fa2fde35b377863867fa606970bc94e8fb457fafa5c2b362e12c. 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/FRX199504741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece66d5a2a191e2c00d279ffb1030f8e27732180538c580a66925d14daa88de0. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/FRX199204718.
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 0x9662077a230c8cee98af35ea3cfa81d1ca89d2ec4388205150167afcea697e3c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX199204719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ba20fb020c13f49a6789e63f81e1be149aac8cd3339f46b1c3903fba1e6ac. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX199504745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e88ef4e3958b4a95fa5cc98d0f9ed07849286822b0997bb02dd8fea2903104. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:42:39Z), 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/ARF049601193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1368e222f16540884c08349d1f19e48d3933a957c809145397fcb1c20251edb3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARF049601200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571e1099c25159a9c6e663487fcdeee27095f3b5e5ccdaa971817318b488789. 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/QMFMF1541888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55abfa343e4e7afd46f78d720e80fe1c5baca054cb3aac841424ea4cd5b7be7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMFMF1541890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac55f6f8aaf697c8aad879fe372b9b57011eb400ac808c168d89c7f07e633cc7. 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/FRX191202714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f6f5216869fc9b0812b1a708ed0f4e214e228d3656ee0ed7bc1a8156de7a1. 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/FRX191202718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa242cbcd041d02f7b4eaa607e79be98885301c7b4dd009c486893523f01061f5. 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/FRX191202721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826ac45d0bcec9ede8431da83713e010286a786ceaf2d69e18914751899de514. 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/FRX191202724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c49fd746085c2f31867fd596b3cade0d1b17894509bac917fed918b28578a3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX191202713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6621d21d1e1519cb7cddecd38e67112bf0b4a070b868a26330da576a3623b19d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX191202716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010bbeb7edcdc5d4c8b1d7af273f7431fff142f10ed27a74069c0ad1f57b928a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX191202717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51732aff77334635ce9191658ea9da32f75f2b2aace622117260cf1e7158cb60. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMFMF1545692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33488e72d068bf145c43370670c9b34668fad2b17db2d90a64fdb6f3584455b5. 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/FRZPA2300000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c55eeeede1f73ace61a609d5d21c5bc0c04b40cf0064abd380963f27a0148a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRZPA2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711af2a144d32e21453711a4d28431b6aa2f0c39f7d6719ed8dbccc867690db2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/AR8L72500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b5c1a85bab96df2bf934ec4937aa4dd81ebe2107ed7b06d1f7d72eb8efa997. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AR8L72500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e4d6b4fab862e782bbdd46127f8520c61540695d00a180f8960e3618683795. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AR8L72500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa4496e17e3b7bf770bfb761790f1d3d2c02ab56752ef15a13bb7a08a6f9ff. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ARG601000362.