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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a251c5fc08c2a539290eaf132165ca4eb2d9e8628aea494ca35e805350a908. 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/7f50b213-ed77-42a1-93ea-d9d123dc06d9.json and https://artists.proofprofile.net/proofs/artist/7f50b213-ed77-42a1-93ea-d9d123dc06d9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08910f7c3ad3dd88466ff2d9b288fd6c9f94114e7a84358fabe3e87fcc3c97. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/INO131605600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f18f65f12b0ffebaeea935c3a4916adae7c7a7634dacd98784c287de9838e90. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/INO131605601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1580b5be1ae750b51ebdbecc5a88f873f3fd1ad027aee314ea53c8b2e84cba2c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/INO131605602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc1318c01edf1331a2aec9832cbcf5b072a54b8d7b0368a41a7075a138b39f. 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/FRX762126839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad43d15901674744beb1f20e35169541f4ec8b0c89d27ea6456a2068fb2bce2. 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/FRX872257649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07764bd63dcd04560c1c94574053e8262a7e67d4c4afd161d83d95227983fd32. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad43d15901674744beb1f20e35169541f4ec8b0c89d27ea6456a2068fb2bce2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX872257649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eea8733c31bd0fe3ed5181a28cf071bf4ac2cd653baa2ebe9cd9373c8f76592. 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/INA3S2102227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535c56a73b87d025a149df32f272c34a1af762d8cea44e9fc55bd75ccdfe38bc. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/DGA0L2387479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37399b04185f4f486b782fe901ffb3365d540dec17f6a31b43323cd27cacce4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA0L2387482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb4ad2874f142b07c57d5286eb2b0941400a5cae929b9cdc8923e10db916b25. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/INT132400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625ae7db2392044a4f752f1d75e6f9b99b61e71cbb3a803a5a4bc4431dc9caef. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/INH102503899.
Chal Ga Sakhe Pandharila - Abhanga Repost