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 0x912b457e2989510023fafedb5e76ae2f3a7b65593f989e277264038386273a74. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f12e1c05-cb62-4512-86ca-7fdd86f10d87.json and https://artists.proofprofile.net/proofs/artist/f12e1c05-cb62-4512-86ca-7fdd86f10d87.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 0xf5e8340084e7ab0065ef0b32c97f285b35e36867b609cd6e339af26c94852956. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:09:30Z), 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/ES73S2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de161df841206b5555aae9c2781e29d09cb9777f0bf655d14819734ac7c8b4d. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/ES73S2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9364fd1addc4039a6e3b46db8045eef8cff4d7f8fb20c1f6693e3f696a01efc2. 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/ES73S2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477ea1c6836a429b1b1c9b40874c91ff1c0517f0d074637d9c80e7f8bfcd8da1. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/ES73S2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fb98782fc5b6265853f8e93a9897774a7c7847474bd822913e79a39f0820d2. 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/ES73S2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40586b0ba25fdf2ffd05b4d069843841cc6b0b31321de622b40039fded1c0b4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:47Z), 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/ES73S2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7596191c68b12f0c098334dc8bbacd90ead6392bd36b35c050ad6acd9459b61f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES73S2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2a9e5262db20883e2e3a6b9429818faa41537223c360b78e9f5ae12c143ce. 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/ES73S2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a31bf6df1e5434885fed63b9ebcc17a7c73625620ac35860c64ed781034e7d5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES73S2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96334208db9096244af8df27744bec8a78dc1865f657515ed49c87219fb4b8c6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ES73S2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f962ea1f97b8b8c37dd601f47cb1905070af1346256f8114a661ad9090b752. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES73S2400122.