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 0xa5626e018a8d4bebd79ece1b8175898dc029c952bf5b4e7c17028a536fdbbabc. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db4cbb47-25d4-4820-9cb7-a827ceb1ae78.json and https://artists.proofprofile.net/proofs/artist/db4cbb47-25d4-4820-9cb7-a827ceb1ae78.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 0xbf1bdf6e2d034f3516cd2463f627db64a75112a0db3c0d4e7ce18d1da92932fe. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:38Z), 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/EGA072400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41609557a75fc3c1d51b14c2d52ee08e2ce08b65243be0527b7992bbc0fb06f7. 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/EGA072400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8982a4c4e30ce557d98546bd9611fb825c01cde0d2e426cf2e33ffff17097. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:05Z), 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/EGA072500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead80e05af1dd5c0dcff1fb85b232cfd8e2cc4abb055ec0d82287bf5f25f6af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/EGA072400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b91d6de5b8c2449d2a6e7a3cbaf64ffee28f85af09cd51be0dda13080228144. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/EGA072400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8cd7014cedb7e11a205ebd35fc2cab3efb4f1c0600257a8d6197ce33a210cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/EGA072500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a484b1b3c88f0c85cc71d2751bc20711b06ac5393b791a4f3e12f81cb48da89. 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/EGA072500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc2d67c431c567f429434e3dc48effc03901ce6575b997db5056e0ef51e28b. 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/EGA072500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54d0adf6b7e4b703d082ea434cab24965b563cfacedf4bc3e5cebbd6f5bff40. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/EGA072500203.