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 0x0afa84ab9b64b8be552e9a407cc9e8644e5ba963e0d7f436a11325bbb06bba7c. 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/2868e12b-d11c-4c71-8c47-28016037f0c1.json and https://artists.proofprofile.net/proofs/artist/2868e12b-d11c-4c71-8c47-28016037f0c1.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 0x529aa065853ecfe266b10b80f67cafcced0ebf0649ba4a63786763441568093b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:20Z), 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/FR96X1629250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3760f59aa2247f8a6ce9d5c1319eb2047695c628c40700e097df54287037168. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR96X1629251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28587f77d67bb57398b79c8177e91b8ab6a02f86ae7f98ec268cd99fa5d21b69. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR59R1715385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be5ed5864317c1474d87878c6eac02ffe12bb2c22b404249e84d718f4c9606. 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/DEAA21800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ceb7bc0f2801bd80a620c6c12bd7af004b738241207cae5be3d1cb3bb5a748. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:21Z), 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/DEAA21800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae362f6bb1e6c5e5b4b7bc89d376d047babd64e13d7ffe85f97458be3ffd7ecb. 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/DEH741910538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48b97bf400e6f2be4f0c7ab0aebbeba9fc17b7897b9ee6c58b115fa044dbedf. 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/DEPI82010456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf36ac7754065bad965af835aa32b6d4951c8d377388c77cacea95ae1bb56e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEPI82010457.
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 0x5d329e660cb10230bf524a468ccfe979503fd441ac81316056fa77a8ecca6a3f. 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/DEPI82010460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403d2397889ec11188d7418dfd2b93a3e5cbfc8c6516a2f8658786ea24bc464. 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/DEPI82010458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d10c267779c89b081b3b99bfdc6177fd9932b29d6e0338ac58d50aab6d5ff. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEH742152885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56935db6a8b735e4a4f29c0596d6641990d8da6ab5489c5744c3b15e1447a3ac. 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/DEH742216238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5ca7093cde6e47e6e04c3e97347c443f2725cb35beab3f005e203746d346a9. 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/DEH742226919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a513aa78ec11f4a17d9e3ed6b88d74b337aaff38d6402580c595d83b19d6e5a. 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/ITFGO2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40742a273525a7a58426ea51f1bd18ab32fc6d9357a4a3c0783055cb92d4271b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEPI82509412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204118d0313d2d23257893bb97319612be0e7d8eb5bbba4ba07b48cbf45b48bf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEEC33501999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dd24c2afdfc0e0daa14921d01cd41a3ec28e2f1a5375b8ed2a43498f922cba. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEEC33502000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0bd37f7df8dea4577bba3674e1e855d707589602d176a7954771efc910f2b3. 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/DES231400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf19c29cbf88252ac96411ee3be320ed418b01e274236210b793edbd1bc7202e. 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/DEU671902041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b50702c7ab25fd782ca20dddf829a5d975e8d0ab1f470713fac8cfd71b9268. 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/IEHDF2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff56e63824669d6e9cbb1dbf8cd73ff74755b657b3bbbc5089bb6ed675e1442d. 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/DEPX42400734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcef62553d9e546e3f688ec76aaeb207146ff42e5f3605e0cbc474111a215d6. 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/ITFGO2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6439efecd0a5acb39698583e2d6c9bf7af8eb8bfebcaefaf031789a5b6c539cf. 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/US83Z2419728.