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 0x470d2ab135ac20a0a804dd7d2912d70a50dd4c581b0f2c5a0866bad46c693103. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff5c8222-4ca1-4d4a-aa00-520df2d02003.json and https://artists.proofprofile.net/proofs/artist/ff5c8222-4ca1-4d4a-aa00-520df2d02003.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 0x57a576c7227c1c018ae3ab948972fb8ee2f035f876f22c3eab645ad0be8cf9d3. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TR0010500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dceb1b14a1845c599eb553525623a5bd15fe647a4f5008d233378d30b5e6622. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:28Z), 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/TR0951600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95196457d53f0b2877a1059ac4b2d50aabe33fef4b55149deccacb4466e8848a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TR0220702245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bcca08f5330c96bba7718c1b928ebc254d04ce00f74697178c230a01f85d11. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:53:07Z), 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/TR0220702255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b1ef56ef6b029bd7f1a13eb3231dbcce5abd6bb0f156851ec046b896becfb. 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/TR4021302915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fe0c654a68a0f449a64b442a0c8ad2ac4e042a016bd4948188e7181ccfc9cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR4021302917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93935421776e1e1ac25a4ab735c12609c76e1808c67942cb9e0074bb4b9d4462. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TR4021302920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1875adfd90afcdef516b9bc584278871c3781b4e281a0cd22997b2cab5c95e33. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TR4021302923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2835cfabcd4e489f7dfa1cb48d8466b4946bc1a2b758ae7eeea1a9ac1c5982. 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/TR4021302924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2519bfb24f4e49755177afbaa624d958d71aec70f87663ad9424ffd8b9b78. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:57:03Z), 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/TR4021302926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711579589733409e17c7a2519c239d59fcf62cc1d14299a6e1814071a0eddf30. 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/TR4021302927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0284378b503bddb8d2a1fa9629fb465d2eba7d1fc8a1c98ef62a3fe4256e16b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QM6MZ1856285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a576c7227c1c018ae3ab948972fb8ee2f035f876f22c3eab645ad0be8cf9d3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:34Z), 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/TR0010500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e01dd872c181b85b39f44ba3c1c6adec99256a9cc7d7df9dcc3fab94e7bd3e. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TR0411404959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2a4b66bf88289bddb326f15ea9b39a2c637e6291503add8fd408242bc4b7b3. 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/TR0411404960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e840220197aa490f4d326b0703d78248a5e1d1a15419dd72b73c3c962206013. 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/TR0241203771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda98ebd740ba26e0fe90d5d811542c86c231e9fad045ed979ec8a874f09f568. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TRAVG1500002.
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 0x29f4f009651c027ecf17a2ea6b03e4eac1dc4f3273ce27806bb7e781c82d3e54. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR0411404958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bfefca24c17deb52ee2a4424a5035cf517bcf76cba92221c5d964613ed1fb9. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TR0241203770.