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 0x25f71b78c989c97547f1cc474560c8d0e888934f1bf210a2ab3d3621c93529c7. 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/88f7f520-4c53-4f78-9b2c-b566e4d96b3d.json and https://artists.proofprofile.net/proofs/artist/88f7f520-4c53-4f78-9b2c-b566e4d96b3d.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 0x630964d9ae5f63554d2d16bb5b96a86d75a436209cd29030d0c3d3a6fa6a4795. 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/MX2832418840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850e543dd229cc9a976e5e7632e40ef69a80f8b0fdec50ca8e10c482ca3d395. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/MX2832418850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8b621970008518d845c24bfdc13cebcf9422da3f9a9be698e7e9a24929c318. 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/MX2832421548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46e94f850b2ed58598a42b084931626d858e1b9c9031c8d9706ce2ed3e2cdf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/MX2832421549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ba7fd545cc1481db0be9b10894f382eb8de5c31a9a5ebd9dcc9b00acaba72. 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/MX2832452400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c95521f8e25030b20aec833602f688f9c4e361b86de98a54e980fed5568fa. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/MX2832452398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb676ee6edc76044b0805e1528c6fa5b80e94d511ff9ee9f35dcc57397e7aab6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:37:27Z), 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/MX2832452402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7466858e41815d2a9029b1ba77ffccf25b8ecc742d924c4ff850879012c9477. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/MX2832452393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6225f17024cf4444a2d6310ea6d695482d1f32315e9dcc5973b8280aaa0dabf3. 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/MX2832474484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828436604517eac555ba92d59eec4f3c172fab030d6c58925687a3ec0e137cf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MX2832474489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6291c94c18cb3e7ea75a38714f3c084e10c9858917850894f50f80d821aaf9f. 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/MX2832474486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d600d61e06d53f4bfd57a2d84b4ad99ba25ae7d68e92a41ccf1648a5f8010be. 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/MX2832474485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a988601aca19afa48bfd476942d92b8d5cf0bcfaaf46ebba84100f55fa732. 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/MX2832519073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffa4cda84df70bb5d12036949235ef2285654a0e754d086ab6c13d74713864c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:45Z), 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/MX2832529757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c74126124efd862688256d77cd1183e1c8dc9ff6d8d93ced89097b96e6f176. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/MX2832535156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42bc704a47bfc0d1abdc9eb0dfc1f94e8c930eefb4dc4372f4cce6401a6cc83. 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/MX2832535159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ac730ddb91c25729887db9f4b27d464909f376437b9d9bdb3493cdf181c6d. 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/MX2832539318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc40f7c35e544840374c7f1c99035304a4c811f260ab259ef5aba6626c020c29. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX2832577465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a209984489c751677dcee6f21006ca1ed51a439b381532562e4a734c8879868. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:13Z), 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/MX2832578731.