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 0x7d36b821e5517ec44006b88f279455d3f7a588c001abb3fbb124e039cf1c7ba1. 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/86a55d24-a674-4a16-9bcc-216141bad288.json and https://artists.proofprofile.net/proofs/artist/86a55d24-a674-4a16-9bcc-216141bad288.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 0x9e0e50f82fee0894c990195b5c345cc667d19c6f29e06c7e9a90e26c51a58d12. 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/DEVX51900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf085f44523d898d590dcf478281b1aa3b29f3d7e8a4c322188b63031deb41de. 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/DEVX52000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4091525c45866b53623051731908a1333f0d53f54a9f5db6dfb0709916f3dc6. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/DEVX52000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37916d5d4ca7263579babc6a3ed16f28462c59193769572dc58e38b3fdbb2b29. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEVX52000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221efc169704830de96c343548ae664178881352304c7ccb879a7f0d5d042229. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEVX52000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbbae9b40ed0e2a95a4513a934e8c3a396dee7b75614aa4e4462fe126c1be8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEVX52000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81246091a999c045e98f603279d283bf7a54a9323503581cb5fe9e818a6ebba. 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/DEVX52000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5e2c1d315b694cae145955aaa7cfb1d1d0a7f0686f631768c3419f77371c2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:09Z), 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/DEVX52000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c1203adc32987ecd1869c50c69f384013fd3747a79904d3d96bdb8367735b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEVX52300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2581805fe8275fa92afbf8e8622146a736a708cc9fdb47606ecf0d7a6590d86b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:56Z), 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/DEVX52300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8165bc34cdc9ad7c4178e32bcd3dd2c6069528eb5f557ed29abcf0fa0d74ca. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:42Z), 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/DEVX52300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c1203adc32987ecd1869c50c69f384013fd3747a79904d3d96bdb8367735b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEVX52300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe591002077d7cbde55f017fe7cd70f50dc5a30c203294d6f08264909edb57836. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEVX52300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2974d42ae14b45f9fe6515387a2a81fbcc94fd2f9bba8cbabb4acc96723608. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:23:26Z), 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/DEVX52300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb011985f917b2e68dd7530692a968e6cec864beb26072194b2a68fbbbe1c5f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEVX52300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4e795f7106e3193a9180ffac86283c249448b91f1a15e22011cca3cb52c7ee. 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/DEVX52300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931c57cfa4b452b232e43697362391afd76d7201e16c0da2da1372f95d4709c6. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/DEVX52300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71c0b2cd8004b690d58dc94e6712e0f2eed1d55b0eff04e7ff2056304a0660. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEVX52300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9af97780d5994b4627521661033449698e3c16668308d4de91adc704b553e10. 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/DEVX52300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ae0e68cbcb18a5f8a40de8dc9d9b20e50e89966a1d66ce6b04c9fac319713. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEVX52300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159229a0b2c2fce855dca8965f37297c3126ce95d675e1afee8fdec1a352fb05. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEVX52400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c8ab09304889cf91d22d54b594b829b9c82f7fb6ddcf905a835ea9e870884. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEVX52400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159229a0b2c2fce855dca8965f37297c3126ce95d675e1afee8fdec1a352fb05. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEVX52400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c8051828a62db3f3c96aa61db7f7fdad45a39dd9ec3298c676fab4e6ced40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022004013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d526e9a1ec4f593556ed31dd9dddd0b01eaad673025d3e7fc181d3bd8bb28. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DELJ81960096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c63ce390728fe1ee7ace491d7e2648187e10edcc3b7690aaf50b82dcd6bd14c. 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/DEZC62347268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c12cad4a7d55621f0387c33c6c7dc431fc4ce4568dfdb3ab0116c4b815b7e78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72402759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985445e440a1a65d34db0c4a49293b267a2086b9bde847692164cdeb7fe0d18. 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/CH7812238534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2985445e440a1a65d34db0c4a49293b267a2086b9bde847692164cdeb7fe0d18. 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/CH7812238534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb7b0e12c6f4855696f8d0e63e9e02beef62304a6e45de698a4d6cc07c7c384. 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/DECE72100996.
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