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 0xed36534d768fec51735e864da4fb34eef25302b57294b4fca745ed857f946b63. 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/9b7ea808-8b60-44f5-ad7b-a52578f4dc4f.json and https://artists.proofprofile.net/proofs/artist/9b7ea808-8b60-44f5-ad7b-a52578f4dc4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Essential Bluegrass Cardinals: The Definitive Collection
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 0x360f4bbe09a5ae59c1044f9999ef60f60914265f80bfb86b13c857230335046f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USEWC0769771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae4f7f6d3a24ddad82d2aaef9c03c922798701c3fc75f73a14b0fec6921d9d1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USEWC0769877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985a345f34368924c2f03c9cfbfdd3a02f582fdddfda1c3673be07f5c5ebd85. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USEWC0770005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf73f3df91d01bb815014ef85af692e552fe7906381e9185483d0be2bc4f63f7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USEWC0770080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf327844da3519ff8c83c9203fb62fae20fa05de77e88b59c7f5a71d54b55c3b8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USEWC0770142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0de1a2fe2d6474fa7315db80b1287c8b285b72494713dcf62b9284c83f266. 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/USEWC0773378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b37318e23d3569fb13afd7f7d0e930140654bb72b0e014240f8e2bca3eae206. 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/USEWC0773860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94846d12648d33498adee9521caf5b441cfa347a0b091a09e0ff3f6f8b36194a. 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/USEWC0773379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61603da281ee0e26575413a7d5e36f501dc40a07c0a3e28ecff5b17ea7241f4c. 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/USEWC1185145.