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 0x76adf75eb869edec0736ae9e8936c40bb1c933f2ad26bc81c6458314d33a9452. 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/dd415a63-fe19-4915-8289-2b0ba065c612.json and https://artists.proofprofile.net/proofs/artist/dd415a63-fe19-4915-8289-2b0ba065c612.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 0x2e1fa1bd365d54333af194d436d934084374a6081ca0eab7e7ac7ec6b3bff81e. 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/FRX452084249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f3001fae77aaef24ee1a50a2d2f00a884d6b059667e0c852c4a8285f655c11. 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/FRS182098032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e69e05a4096cd23b38387e561d788d3fcee5a708a28b409755a03d77467e3f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUA1H1903384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337cb01abf2c8a95a90d2bb243baaf31c17131bf362f0e12aeba50cda0265d2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR10S2002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec69bf36ce16bdf24bfbebc2fd45c7d6f449f7add0bd7b200fade3a94520cd. 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/FRS182096305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4db5a6d751cd8d9203f60bae0c448bbdd1894146b27c66d13414a1b22bbece. 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/DGA072160751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce708d82239c0adc1ae6123f8ba45a7701c9a5d60989baae213b99fb2fcd8716. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R2120526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ca2eb8e55709cf704436c0c3eec4edffd0d2241fa08752dcb419bdd4fbfca. 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/FR96X2151827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7daebe436c72b192d2b7b43aad2da34e13a0ada1c1d5be2374c9a3d80b88de. 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/FRX452140896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd399612c2216372b8b41a7bf96736fa07dd73997263b9e49a7aea2ee78143489. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FRX872141579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e75d35af4d2a34ea9d5a33d3e93e4a7b6a75e8e6c32da60fbc0258846d419b4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:33Z), 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/FR2X42290336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b320b481a32002362703bd5dca5964eb13ba9a9009c7a7c75af07218adad9d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRX872242231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b6e8e30fac986299a06790712979b694b46a20adc017df73e66b3681dbec94. 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/DGA052367061.