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 0x07300e3b57a33cf64aa7f1e088613fdfd6ad7fcc9174e33d7f64146448a3befe. 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/7ccfcf9e-4af8-4873-a56b-fe7e9e1f2dbf.json and https://artists.proofprofile.net/proofs/artist/7ccfcf9e-4af8-4873-a56b-fe7e9e1f2dbf.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 0x463b7203dc7b4740164aceae3e7ed408905785ffb65fd216b3de6f6cf9d38b78. 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/QZTBA2206702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59017decca58c256de42b15db7c98319f0a7c05f3466fb8dc60ca7a5fe489067. 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/GX8KD2413712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975537a044009ac2cb04d68e0b3e5b9ea81c140f53705647cfdf4e6194acd157. 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/CH6542410255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72750ffa9f03edd938a66f958a405101e0a75170f5cda87b0a820b669f6a4e89. 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/CH6542410256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178eeebd50d2573a5e77c541d321659410a547cede5898cd425d2a93c09a4bba. 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/CH6542511191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f7af1e2e4b08953b515466a69690aef858fb6817b9972c128234925f1c3cf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6542511194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55909ef2236fdb7b42639ab09c7821183cb2e534feea54dbebabcaae90c8ce. 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/GBKQU2550548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ee693851cde70fae211e34324a714321cb65544e4de95dd5303b74a1a55be. 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/DEVU52518602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cb1bacf932c6edf007596b3fbe2da9a6debae48b6ceb58049281587af3cbd5. 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/DEH742507811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6be976e15f13a9f31af79dbd927f039aa6a19a3d028615cc21d34e590b1611. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUD92501884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96378096cfaba0c717548d06514f50c315677d804005d7ffd1deafb0c4e4044. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2521510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372e70e44d05b0048ea5cfceceacc57c0d51aea07ddb93665618e715dbfde3ae. 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/GX8MV2500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a5c51f07699d114d73a75145cac3e79b520270da79f0a0ec8eb65ed55c18b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLQ8D2400699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f999ef8a8aaed351426f4b277df070fe6fae57b7050ed389f35e20c11c2d808. 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/DEXO22475174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b75159ac9dde7bca434a3d9e50a42f842c14231ab9bfad7cf2c80e086d1914. 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/DEXO12499980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114e6b894ee00b07ff788b14c4bc994167abe07a7fd298e3d5111670c4944fd. 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/FRR642400341.