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 0x07c5e391c3dc71d38708829c3b9179bfe266b3f089a47e4610ca84f0849e12e5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/273c5f1d-3038-4225-9fe8-55534a242dbb.json and https://artists.proofprofile.net/proofs/artist/273c5f1d-3038-4225-9fe8-55534a242dbb.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 0x9730124c5b57068403379c21826023b11852b2338f2793c2746b190afc0fc5ed. 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/ES5951605402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e5c3a9a0aa1a509e7bc8fda07c07a1e8e929f5731e3d152c90fba31853555. 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/ES5951605404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc4c5b1cba9d1fdbcdc00d7edc2dc9a97dafbabca16b85b691f431ac9ed94d7. 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/ES5951605405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5313b9e4a9bad1e91fe71f3fb2156a8be5cdaeb888862c84177ec5e38de0f47. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:28Z), 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/ES5951605401.
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 0x64c4793e1fbb524db86a0dcb3b2259fe5cefb5121e05db0f00b0dacbe18fd513. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES5951605406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9445920b666cb03a9a5f0f6890e3b55220d883a5f10a5f7c798e3f7bf1a5a9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES5951605395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ac7f1d8ec9d51259943aeb7ef5e03c2255d3ad437e2add496894e3c7ca47f. 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/ES5951605397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a43e168229505949ff39336b483f978f2387ee900b1d26aab50a8a60637c786. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES5951605398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f82a3e567024069f4bc9ac3aa425d61849825f977ddf1d80c6328abf875e349. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES5951605399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de82a3b57985e81b60a6689bd8169648d68a390cf24c150f0cabfd72a9d5598. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES5951605400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb3c056dce99da128c4cbc3bc8b81695eaf8f06e73ddc22ea454600505b03e. 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/ES5951605403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29bef253eabac619d5f8f7a5643ee9fbad1196c9b179f200e02d53874137478. 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/ES5951003482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e03c26c408a1631699c01c649d25cd55b23b1c1bca5c95b50e5003535b8a64. 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/ES5951003483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fb38b949dbde9377e35bb849448d06177433bc46aabea0774362ec8f097d86. 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/ES5951003485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c906e18bafb796e9313330f8a207082bfde5ea6ee50e229c47de94159a73c0. 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/ES5951003488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15c63c93aab65003eeab5297e2a091f26a5f8e1b9a4a44f23f03e26ed2bddac. 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/ES5951003490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54435f62202773f7e3fa0602ff970a8c980c160226a47ab27e1a4066ef3306. 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/ES5951003491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bac446a87cd344d6f583fd6700f146efa319b33b6fcb415982056123a920a1e. 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/ES5951003495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60e7531d6a6b4c01a8327c22e93c5ead0b673fbbd1ea9fc1bf8c83737f8fb3. 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/ES5951003497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f80223a07070b878f245ba7276e153cc19654424e0f075f9397ec81121bdd2. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ES5951003484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c3c35a4a32113dc877916e2e885a7b6d71513139ecd6098d3e45e417ee157. 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/ES5951003486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb4d03e0d561b72d27451fcf07d39be016f31c865d61a7bfe4fa2f240cb101. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ES5951003487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11f043abc0a943256ed7a90105823baa3dd2c878dbca636afd2eec0d963d27e. 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/ES5951003489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9476ce19e6ace866fc049a4be8786daafbc9b8e273e5a1f624f8186c22724. 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/ES5951003492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafb5337d2f497b5c8ce261be3c3abc144c16aa0c68af6e84d44a9fd12df014c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES5951003493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47865bb3f6f0e2f95ace48acfde72fa7944f825422f7120bfe9b831968f7edb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES5951003494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535fa4f8a6e78689e987ab1df365aae6881727554816ed9b7d4ec47baead5ba. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ES5951003496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822fca3d283585191c3956f5f2023440ac490dfad750fb68557c378fdadde4d2. 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/ES5950601995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4fce4b506f6cca1afaa5c8313aefb9fc39558e801eabbc748dfb3b826618d. 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/ES5950601987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb647788d06a5cf4fcab9428caf66726f3a6381b2d6806d5464eea2cec8649c4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES5950601990.