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 0x316217ba08a7807e8f74518bb75a17b6ef39e23be1a1a137a332bd2cf24f60d6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87ca400a-deb5-4f66-b3af-23a79e88d252.json and https://artists.proofprofile.net/proofs/artist/87ca400a-deb5-4f66-b3af-23a79e88d252.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 0x2ee86f2f14e58285b9288dae2b59f217fc0ca03e6caa3f68e359b6761be876ec. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEZ651302718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27deff87296af958a49ac01854500395b360791a6ca611ca801212f840016cca. 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/DEZ651302719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fa02055158a47c3271b0ba4d0387477d8d9c1cba01242e24bad56221ca0712. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:38:55Z), 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/DEZ651302728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84cc0491154e253f09d74841b22742c61541cdb49bcd9d3bd871ec4ee7d6214. 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/BRVRK1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ce939e80c6c5234775d6a73a9dc6921b97c5699dce3b7064cb8b7df0419bf8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:32:09Z), 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/BRVRK1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ba8cd2676a6f92917334340eae93589b15f94f54b757b8311aeca2b40da228. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:17Z), 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/BRF2G1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04495957f46e69b1ff449ea0e4f002c81446a2180469d9e2b932d9dfb2cd95aa. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/BRF2G1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36025594f0123a89546cc5d64180964c595f0d23634dd3d3c19190083630c83d. 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/BRF2G1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7f1794e3528835d84fcc64c529f64eca80e1b0974f36e4cd23a8f57f5e7b29. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRS601800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac923ec08d8f89c7092f3a571ef14c1724110274a6ad262f47e7d73df869b60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRS601800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e2bee593cb9b6c0ea019c1b965c1e907e0a28acf35624666cff3855475e4e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRS601800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ccefb618e524fb8c2d134792d9c59f43bd829a90974975f161d4222722e371. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BRVRK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de610a58223bde086fd8a180c1b08c6177543364bb71ed8f9e120e6b4d6e2b7. 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/BRVRK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443747025a365e650e3f5942f02e73ad3cf821781c6e40876c235a005847cc7b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BRVRK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d1cebbbd83560cf156b4f8ac06d489d50568b4c4292fa32aa9502432dfa34a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:49Z), 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/BRVRK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b097f49d926fa8689c961e59d4a2cdf6dc232f97e4ae3dfd1ee3912d594b81. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BRVRK2400007.