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 0x7fa7828eb2b1423d904fc2fa63f1dcd45d87154049b76257e357440cdea4af8b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d97df96-acc6-4cb5-80cf-6249c30c2b3d.json and https://artists.proofprofile.net/proofs/artist/2d97df96-acc6-4cb5-80cf-6249c30c2b3d.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 0x12bdf4d2d5211fe8ad49a4f8a4a2c320c8c526f3b4c995c4670d0260cc8bf7e9. 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/ES71G1873618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090447a3e0e96ea4ebcc45bce087c4e5929b77460e6dd9e3c917b7540c104eff. 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/ES71G1873619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668af908f52771234d7f66d0373448a3cb0271144958c0ced4384692df08456e. 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/ES71G1873620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5349b621de5a5ebb3b8644c893101d7c98464bdd2da44ddf720a2244fb699aa2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ES71G1873613.
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 0xbc6aa4c86591ab383cd5afca9be17d825b2c67be7bb75777f6c9ce428f0b295f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES71G1873614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07af9fe7e9ee5081832e6853899831ad04ec3d04f03b14fa4a1628970d08ff9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES71G1873615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bdb51266de0519eadc886c27506c8191eea359ecad3a8e311378f7691a52a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES71G1873616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0417ebca4c947ac51ea4d5985746c74068118d79f5c457e2fec2d9a07e9d2736. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES71G1873617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d6c0958fd5fb5f794b0bdc5e44ee7358bd477898103e1a6c4b4a3e124bf7c5. 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/QM6N21479068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c770fe9f0bee405c9a79df8f550d60646ef93b2774dce3ef0677b9015927f. 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/QM6N21479071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81d41e2d05d04336bec3617b145ca4706b2bb0d7aa0eb1356ca1bfb90ef3653. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N21479072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab7c711b96dcab195c52d870c23931effc9055e748bf6132fe9c1ccb5db0c0e. 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/QM6N21479073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5176256ba3b49869fe799d2ebbd31974435aefb45a288dd9f681b2a05e2ca051. 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/QM6N21479075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2177de417c221d404a15f88daf10edc89c3d92adf22cba3d4b2fa6b0feae1063. 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/QM6N21479069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b9ec5adc2cb545e95bb4314ca9f1de9d03b809cc9e2e2bf77061c0de21ab5. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM6N21479070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fe3d60b035d7b6e9f1b415a219f34474494ec10383780b10c813ff97d116d4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QM6N21479074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a4487763b6f2e42736b06b859953d639c570b7c65c2b51d25a62ccf83d1006. 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/QM6N21479044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7474f45f7653e1e33265b70646cc346524c6b71c41eaff1a91daee2d54512d. 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/QM6N21479045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d3d50ae47ec212884b8268f987f6b63f46ec28e3047ec94131fcb651b71f8c. 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/QM6N21479046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c92b72421aee894b0070ca5cbf19608227f846e8668ff3c6102a036b17987. 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/QM6N21479047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a057de6bd26753aa748342dbce97dd4c1863fe603cc94d9937bb9882e917bfe. 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/QM6N21479048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6f40782e856bef401537eab737d81afad678a834de15259304697c4eb97166. 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/QM6N21479049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed91fd9f9fba564b4bfe9d14e32976c1a3c8664ac56b075724e6aca49afb82f. 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/QM6N21479050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e424a7b360d0a1fa22a41940c6e713c65fc1cf9666b576ff01d0a39a067d5d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6N21479051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ea85c13a09cc74cd73f0ebd7f8be0e653affe184d73e343fb767cca07155e4. 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/ES71G1640941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce933fccd79f66685d40ce3b4e359934d20d93271cdfbf79a6622c362957dab. 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/QMBZ91562393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d15899b578ce2a3609a4196da2fcd4a23b30f5f22e2f943faadcd8424d776d8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMBZ91562392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213bae253b3d3aaf01a4fe8707335ca90258902197871212cb5d98f24e1995fe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMBZ91562394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b039c2e42c8c6eef3c76ea7bbf4158bb11ef8913817b876d8d4516fb595c6ef. 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/QM6N21479064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385599ae563c44a3075973e82b6de9d6688821fed16cf911515fa65405a84ece. 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/QM6N21479065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ae15dd2ea61a57b0b0a17eacbfa0a11abd649af8c550dd81f98956f1085913. 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/QM6N21479067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27804709c9258f7ae14da9569fc63c1f0208491c22330e25b047f7a4989741f8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6N21479066.