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 0x1a6d64f18c9d9bd0687e8905236bfff7bd4506b10ec838c9e2d560706e1d1f50. 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/32ef8402-6717-4da0-a8cf-c0fda66963ea.json and https://artists.proofprofile.net/proofs/artist/32ef8402-6717-4da0-a8cf-c0fda66963ea.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 0x2252b7827778b91e029d9ec59dcbac1dca703bf99a3d6d0423b19c596a224efb. 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/QZTB92447630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303776f5efa47061457a82e7b70da92f387d4ebbe4054b1427b78d97af0ae449. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEQ2487233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616dcb4e01b6ac04e4a5f5dddbc3dcbacda5ca85e19411f99cb6db10377cc9d7. 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/QZMEQ2487234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf0cdce5e5137e498204e53860950f5ebefec2bae16200bf42a4475e9f40252. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2487235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b0066f04a3a7e6e6cbf1787e56868532ff6bd605646e884331c16df559785. 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/QZWFN2351826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d5a5743e1194759b6d8af4e10be1720a8a415ea37ddf7d4ccefec3aa4afd8b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEG932304565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ff29692871ee17df86dbf05f14bd6009a0b4f5c7804e839f9e7de7457b695a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAU2354165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681e8df4d434c2e7d35a90f5b09be21caafaf0b29fc6f381c13c8136016b2b3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2334412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe635d82fbd1065b486227d1cee06bab344a303f8296880ab91f38a5dedba6889. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2307808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c1071a59f164e300db39cab15ae95c920a1a842d6cbd8b32c42e67d7dcd436. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNC2377726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad90d621fb45095d3396597b567d54aeeaf0390dc9d62a55db29acef3a8996a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM7282467176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75184a3aa65edb562989fba6e2351ead0a7d0841ffea48742bc9c362cc346306. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92485005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75083775b24de167a36f35d55e9f44b1716e8c21f6bebdbcb68cce549b1f188c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92476411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b5cb48524b9e80439a61ff05930d416ac43e168e0a313224c8b49ccf93e62. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMBZ92476414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96925c5085199ebc142b8d8e522ff1a274614be212a7a615258633fdab12b355. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:51:13Z), 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/GBBKV2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf0f9eb68b75392009c608639f2433a7d3c61c03b80fbccf03ba81b73e20cda. 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/GBBKV2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c8a46031951932a1ecff0dfb1efd509c2cb7875b832b6384190f0fb0d0f6d6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBKV2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5a740db410f6424374f78f7f9cda1523d90b524e4f6e021ce190fa9b1e4fb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBBKV2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c02e8ea1b7e2813c3ef1db269aaec096d58802377ad4d11a9e5fd6f2cdeaa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBKV2400125.