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 0xf4ba14b1fb6f6ed162bb5c54164ca4b465ad0395c0cb7f2562050e997aa1a937. 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/ad9a502a-2ccd-49aa-b06b-ba016b0d5ef6.json and https://artists.proofprofile.net/proofs/artist/ad9a502a-2ccd-49aa-b06b-ba016b0d5ef6.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 0x12c523d3809ca3b035f4e8aec584dac4dfd0fde20c230e16b7285de7e28ebf87. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2152781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6b16d0d8ff8f6e3a3ed88d57b14d60f3a3b1897c98101ec4642fe7c9cb2998. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM3DF2152782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd175d2a16f1dcb0ba05ca1b448566e167c138ee0fd29607034e68eaa92e81cb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:55:23Z), 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/QM3DF2152820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d398e75239828aa356e2d781ad91ad32087ddbc9f75973dbb57af890a0876f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2157045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a44101565842c94201cff68fda0f135494749003ad6afa1fe6555a93d77fb9. 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/QM3DF2176204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb99aa0d40e7d3c40a1ee04dc6ef1bcac810faa967c774e1cd3e546dc54801c. 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/QM3DF2176208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d5d093c34f59df2b3ec6df5d116a36d806c47ebe03447f25160ab0b0cfac3c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:16Z), 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/QM3DF2176209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ab602a6d9a83ae80549b980377eea678b93a64db2f71b4bc7de23c21bb378. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:05:45Z), 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/US3DF2208751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862290d2f6368dea0571e29bd7db236dd8f63bb05c1b0efcccaad53ea5441f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2208760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e65e1685c7ca35b672861aa75d88b3fa73ab7a982461b2db798a176f408b676. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2242433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f434cb5f9a311c81f47f3774ed48f2367a71f57ffe67ba6cbc3a5755a64f0c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMANG2203840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3c328c0342f8ddd2bc085dff92bd26d8f271e1d3e5650723109405c10a360f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:19Z), 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/USANG2499567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff837ace1db8df6e8f43c96c222191cb91be01924ea43dc1a83dcccb2da0e65. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:01:26Z), 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/USANG2499575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76e79da13d280e8d3bbf6fdaadee5c25aad3fa8de04798957d2818303e6b6bd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:57Z), 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/USANG2499576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de56731ef9d450ecd6af34874a93c73de049d82e8012267a75e3deb0942978. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US3DF2539924.