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 0x8e49cfb640ff2a316151381b27a1ee6557c8ddeddb5456a9ed3fd20560e6479f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d19e4a-3cb1-4947-8e90-f732561ce9d5.json and https://artists.proofprofile.net/proofs/artist/e1d19e4a-3cb1-4947-8e90-f732561ce9d5.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 0xb3c8cf95d95b1e16f958358bad4a84bfec0f0557851d339b466db5d5cc78a1e9. 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/QZMWW2282120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3afe6c3102b3db88d1ff335d7966a3f01283b2cc5c2a57ea2f6bf94580664. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:58Z), 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/USAT22502459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621ff3f9affb01daa0884e45dc447d7b46a2b6042f7e3cf8c889bf74fa37c45. 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/QZK6K2226074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1b57c43a2762f53ede11731869e1237fbcf4d7b66cd1222ead00d8b280186. 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/USAT22502462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77f7cf48814b6727ada19e80c8ed82d870edcceb3ef02382584661f59fe9313. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USAT22502452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc732b574f9a8ebac4c5c4e50ae71dbd2cf95ff358070eb3f886439dfc200d1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USAT22502465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36182479939d21914dd046f2dc6ab433a43d9028139f749047ebb99075532b2. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USAT22502486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f26ee689a7f5532d9e8414c2471b570402a493071b9a4f0899decbdaedb0c3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:26Z), 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/USAT22502487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1df0f82e5e56535bb19e4c4bacc88f7515b012c1b8fd276a2af138f926d072. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USAT22502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2dc3406417572de74b20ffa4a83175f85bad65340d897b344f9f9858b05b6a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USAT22502492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8baeb1561e11c3b312a7fe9225525af8261ab15335a89bbb0c094c491b7a1f. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:56Z), 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/USAT22502496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7671b94eb4d79a07596ecc36fe5c0344e343a191abf22c319e71efc1ddb5d3d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:59Z), 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/USAT22502497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec4972a2d8daebcd87c3f3fab4ad79b752529d699e78bda2c9eabdedbcf3606. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:38Z), 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/USAT22502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0057e0354b471711840bf2ab009a22bc47daa664faf4162bde784c48b25a55c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:48Z), 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/USAT22502502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b21fb18cdc397499ecaccb39fbae5d1c31aa1be8de5e7f011c1ea9c37d202f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:21Z), 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/USAT22502504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d973474cac5043b4d1264c8e2848026350a6830306cfadb6916f01f76e0272c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USAT22502505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c90c1692a57f92e1471b88f363cc41b2ee3e2b55819a5d5120513a9c3be6178. 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/USAT22503125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9963a24735283e847379dc48388c4e2a8431fdb3d30cd3c489acfc62b9031936. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USAT22503128.