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 0xa4b844d4285a5088a67bbaecc73845a4cfb2b6d2e181263d47cf887857666e5e. 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/dec57cd3-d2ef-4828-bd74-1d94a2243b1a.json and https://artists.proofprofile.net/proofs/artist/dec57cd3-d2ef-4828-bd74-1d94a2243b1a.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 0xdd997b6c3e8b59d1b7c767077b82024731de08e734bdcd66134e38471d84e097. 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/TCAIG2435488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3098f3ac66405911fbc9aca079b3d86987f38b0a92adf2a153a9d4a8b0a0ef. 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/TCAIG2435498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0c4d2b86c3e7e522831b3a7c78cd458d1a59c19f0a41f0c77acd944594e15. 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/TCAIG2435503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac69413c9016809805d111cdd433d3dd11dc2a7740739e1dff02cbb958136b9. 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/TCAIG2435516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e90282c70fb6893adf75b4500ed09699e15acc71bcc464641f7717e0e20992. 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/NL1AP1921402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4fe7e62a74b962589be20215b1eb91ef72ae275bfc4f202868275c1f2f997a. 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/NL1AP1917159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8317133b34e7e9b3adef0474bbbb84df95281cd76572f289ac665bacd8df2057. 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/DEZC62438738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3098f3ac66405911fbc9aca079b3d86987f38b0a92adf2a153a9d4a8b0a0ef. 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/TCAIG2435498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94f47a42aad1a7519f3802ecdbd851f7e4a092d4f2a0473e2a3cc0888a2d0d. 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/DEZC62346366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9dfb0484564ba428c1f5ef8daacc5933525ee4f2b6954f2a86b1cbc58855d9. 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/DEXO62223708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49470da8bbf4e41e2bcd9c66eacfed2907151f7684e4dea4ed734c408220fa8. 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/NL4NL2220009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aae717086a46ae45b66631d355362eb90fae26648076335e8e7f2f57f761d0. 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/NL4NL2220010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0e2145c79e6f52b83da5ae7e82b8940678608e8984f53486c9de49616ef80. 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/NL4NL2220012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c1bace9152b62fc8ff38c95a837c10a376038556bea95209ab7700d7273a8. 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/NL4NL2220014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bce1cb2eef41f9aff24b64f3ab9bdab3e34f09f0767f4380225ce34f457e27. 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/DEZC62462903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ed6fd43f86e8ce0944851803415f80010cac53bbf48937b435e7b7c2cf60c8. 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/DEZC62580124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4882001d8691ba69673e9fa02d541c1a9ab48b2ceb9977826300f231b4600dea. 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/DEZC62580131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4522fa5dea06e574f22d745ee982162c5bc2ea788f480ecaa9e196335264dc2d. 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/DEZC62580125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef66b132c5cc3411d38e97156d3838ad8c212c9658cd9db9d3a65f9267ad48e. 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/DEZC62575345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcbbfe4912433916a4ecdbc614be7b12982b8edc9a5c773d1839b02d040c294. 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/DEUE12416531.