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 0xbcb2febcf1680a07d3118969a60e76e7c76ec1fdd05815a86fbfb14f0f126970. 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/f203c9f0-88c7-409f-9b9e-d4c4478c102d.json and https://artists.proofprofile.net/proofs/artist/f203c9f0-88c7-409f-9b9e-d4c4478c102d.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 0x2281ec1bd8765402d25650a1a89373b85ff932eb8b898d6af09e6cd087c18fb9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ9Y21746654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2de102a05ae21a03a364b66e961f172d27a6e584bef7f211b280680456f63. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZ9Y21746655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265802919385d79281cf3ff81b82adf6bd65cf75d96c5b6920fd29533cc6754f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ9Y21746656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67eb2a69aec6d5925e36d8831cc66fa00865cc06279d71f5fc0783c3cabc47f. 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/QZ9Y21746657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350faa57bbd96ccf42b955ad2875080f725b38023ed527b180848ddab49beea6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:42:42Z), 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/QZ9Y21746658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8871ad8c277deb94d60d8e6a781fe557a644a501b481bde499c23c2822f2567. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLE781900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d3858bcf5e365840e5a6e0c490c2cc8aa38c013dbbde464e972c64a03367ec. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/PLE781900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fecce88e2f3d7231551c6bb22a00254f8014b4af67e9413c8acb92a7f74274. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:52Z), 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/PLE781900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83adac57711323a6b764deeb7a1c7a84e59307971368a96a2bd1d70d9a5a2d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:44:55Z), 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/PLE781900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bccad7a2a73113fd62b01b6d1756258ce061d93d8d636bba06fd09d58f6db8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLE781900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965bc71e140c40a0a0ce3f37043763b8658fef3d33d72356abfc97b979cc7d54. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PLE781900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26857439ca46df2a6c0ac19deec6404004a4ec86f36c280945895267368de4b2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLE781900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d9020b57a770cb37513fd890a93ef3623fa999906181ae4f1320a2b2b3c8e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLE781900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd2b889f24a624051968cfb2ad5113c697760f4855d1c8a40a8a30efbd36162. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PL31E2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf231d888a2b6e5fae470a969ae2f286ef22dbea34c4b75ae3f2fc4e1bbabc6a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLX282200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed834bfd9221c0ff3626c4b936dc48808860532b4d3b346c691ae4183cef37ec. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/PLX282100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec2789b232825a1f90be17e5089dd8df972b2ed74ab16579ed738c44e268f59. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLX282100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0818497266afc25dcccb760e9425e35120e9bc79eac863427224745e39300. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:37Z), 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/PLX282100014.