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 0x3b8dd8c8510a9bb1b4536da39cc39e2d56310e0aed5b8f620d5f053275c32c21. 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/6911113f-a0fb-4e39-9698-e18ffdb4dae2.json and https://artists.proofprofile.net/proofs/artist/6911113f-a0fb-4e39-9698-e18ffdb4dae2.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 0xf0d53008579863f0f2b5191508d80af73f6a3204aa71753bd82d2f6690bef119. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZK6L2212126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8367dafd2d77f7f9c26348a9960a78986ae533f4807967d900a6de533477731. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6L2216515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a72caf076d14d636ba4fa3e66570ac1212528e7b0c9f3d86183b6aec2c5ba88. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:05Z), 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/QZK6P2248711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd15b9ad35b37a67a1dfcc881166841b9c69f6dbbc7bfa87626daa333cad67ab. 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/QZK6P2248713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0384fc82bcad41fdd9fcc657e7e6f0f59f3b157d3094521e2b7c826dfeb460. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6P2248718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78ed1ec97fb2b3ef70cab05ec0205b4b5406bca38bd6a57d0a630696003d3e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2248719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59847bbd6007a7ffd371c880b4c6b06444e07647a76b98c703614d3e2b5223cc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX201781312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8cf9ca806322b9c26c0f230b027e72244ae2918d0643f2a65ec20f03de35b7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRX201781313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cd435b765e7be86b8d441616b58e06a5efb8bb9aa874eb3f2fc339e282cef. 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/FRX201781320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc700d96cd5ffbba5763b6dfdbbaf7ba7ff37e04f40c98a1efd151702c10826c1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR10S1713526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae5a9b16d532d39b2a703c61d795c2b5bfec9a13c413170b5b3be873ee2b3f5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6P2215124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d041c2786625b78db7e84025fe3e03ab59350c7ae18e42fa6f227dcf2948cc. 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/QZK6L2208407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccda269e36186fed1763c781ccbb69965ee24d07a367a479c16038e2ef8831c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6P2215145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d5e17d141448406a9cc6aeb35d5a72a4dcaa665b6bfb2fe3ee5344fb8948a. 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/QZHN82388769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591ea556e93609c37e4caaaca28c0bf2205c216cd4a6e985b0176bd40f5da802. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAJH2573644.