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 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 0xbec9200264676fd43f04202449906d5b7aadb602929dbad000e4561d75097d1d. 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/0b54b625-9ae5-4cdc-a8aa-861566a87956.json and https://artists.proofprofile.net/proofs/artist/0b54b625-9ae5-4cdc-a8aa-861566a87956.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 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 0xca998c836e8618ee9b0d875a1da1c637b1580aeaf242a6593f1a945bd8532593. 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/TCAFQ2113950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58234a8b603372c8bfb7f60f5d535b9c1edceffc0e0725219b0c6e710508fd3f. 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/TCAFQ2113941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249c18a65788419d91a89e2ba6baf9b82b1ab5d688c30808da319c8660f3ac99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFQ2113946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e128ce08e910000bd994dafade8c413f1e4986bfeac2bbcbee3571d111f5da7. 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/TCAFQ2113936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ac97812be17f5151a2e5a1e34ba96f49d5a4a284f8101b3fa4a4e459012de. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAFQ2113954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8ed2c48b043e7443d9b30d4b66f5b9a000ef8f08ac44a3c3e9b890bc85da42. 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/TCAFQ2113991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87d2e4d5e89ac847ac417b3da94f3877ffed6ba8ba9a66f6b433a344c96eed3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFQ2113960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb0f8f687f332d65e7da731ef775607dd156bf19f533546cf9dd2c4c2bbaf9e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFQ2113939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5fd3b0862aedc5c398628ac4c1ce30fb078074c66556a069ba51fcc3bfa152. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFQ2113929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1c9e5274c397ed6e8f9209a3e55e69aa55ea6ee1b0f749e8fae85f6978251. 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/TCAFQ2113986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c8651301a172cedda3e4e41c15c99a136da6dfeb760539769de28c74b0bae. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAFQ2113933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f4e1a209f3062f84ddc8a3b7c5b861782b040156467c8c1d3ceda542c36b85. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAFQ2113962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3002ba41b16f7f7a6ed48c176d9431dc36187ea3ae59a6da4c8fd3a99100a. 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/TCAFQ2113984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7bad71df614e199fa91aff05b16f02c7dc41e64fea66e7471ab625e7a8c5ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFQ2113967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92edec2a5e5182ff0bee283911da0c788fbde1853bfe20b4b4430d19e7a0d3b8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAFQ2113971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c60923211cf8305b4babc418615a533c5e5ce6d6a2a32f0d860c3f1cd4e8d. 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/TCAFQ2113976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf736efafcbded1a1dc688dff9b7cea272c583c980b9a0df84d38c6a927f1947f. 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/TCAFQ2113982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4a2950863f3a147e2fcee39fbf69b2fa7c32d28e57572cf998711b54469d4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCAFQ2113959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae791af22c6d5f8b02018f15410aeca4701d55c4243c231543943bf5a8626dde. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHP2326019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df292bebabc49f070c74084842eea7ae1cb69afa717b4b252d1abc5b6cfffc4. 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/TCAHP2325895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aca77a0d2f7815201f11db1fdbde1d12c53aaee8438d3a3e0c34da90eff17f. 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/TCAHJ2341588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90cc23b61733674a635bce418c65bfa5f1f924cb9895bae18cc486840633233. 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/TCAHH2317773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885d8e6b06f41745e1d99d4b5a455b17df8e3eb90ac290ead543a857114208fe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAHG2318007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecacc3b751b996b7654dfcca8046448325b433ffc9e8ab85184a585c8a4aa0a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGL2276367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9a6a26472c072f84abccf69dcc6457228084943c39c5f46a5fbe5321cccb1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGD2287874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd44f166fc18119a61c1130abf0153d372a358eefca6a5c5052653da50b9c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGA2296443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8623b3ecdf4cd5309f37ff3643f483333b2c4b9f0cd02a4ab0442e73a5d613. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFX2137590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de50581205b89039657211f8155edbee2ceddc223697c272d00e477daf2743. 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/TCAFT2110515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0889d0e8ffbe8f2bd4d867eac3c1b6cc8474459723ddb24d4dbdc8c974452. 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/TCAFX2137606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de50581205b89039657211f8155edbee2ceddc223697c272d00e477daf2743. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAFT2110515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3096ad841efa5de2b9c04ac7550ae23dcda4fb8ced1c56c84b111cca64ce6ae3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFT2110645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb64f0fc581bd3f641a878162c1cbd10a99d75b85839a51abcbe5ae7021ac1f4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAHS2329371.