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 0x8f66f4b86a5d168116710e5a07147eca80bcd1eab4b4097658b977d5d0bb5b6b. 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/adad1ac5-26bd-4b4e-b8ab-e3cd57e327e2.json and https://artists.proofprofile.net/proofs/artist/adad1ac5-26bd-4b4e-b8ab-e3cd57e327e2.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 0x1ca152b82f5460fa0ab805ed2e1b5110a55a05eaa97175e5b4f0689a12b02838. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/HKK972304792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a668fdd1a81bc440749c056c1ddc653037039b235958934a1b01faf609563. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:34Z), 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/ATR981313475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1ca59800c7af98c7b52bf80155b278e2f3ae4592011ccaa73a2addbc201c8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ATR981313477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea97f983e5d562ab806d28be9372e07204cd714e99961be58be39112c2e95a57. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ATR981313479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a0eae4cc9ae16015dfcfdb4e4cc0f46a8b0ef82c14e3ee3e065b7a8d701ba9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ATR981313466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a97fb624148dc87fa4b2a1ca6b3c079a1d6b02879e03caf35600276d037cc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATR981313467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493fbf0f63009ad7fc6ab1d6757f85d94ac4ef84e7e65f915de273e25159c3c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATR981313468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1966ceecf97cb66ad7c8e02403297442f408465f97e4ba753defe5507d9ba6c1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:21Z), 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/ATR981313469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb131692324d803381d8b3f4ccc3139e2b1ac8ffb34ec9773741b9f683ecb0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ATR981313470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4569a35d3b05ec0ef34e0f3588fdf4df322f5da7c1ef3243086eb5d4de69220. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ATR981313471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f49b779f5936e86c4fe5439e2550763ebc4deeeda0c2367142e7b14647165d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR981313473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0321001825df589eaa0f5f9e3d4da761ee6a774fbe191bc1a8440d9f139bd4a. 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/HKK972311269.