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 0x1cc47ac9b6dd8ebbda0eeb8c1fff577d5d9c42d484a3ee73228a238236519ad1. 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/b055604c-25ae-4e0b-a058-4fa0e1b661c0.json and https://artists.proofprofile.net/proofs/artist/b055604c-25ae-4e0b-a058-4fa0e1b661c0.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 0xafbbb56b0c4b5657f20e0cb4311b9d06169840322b560f328d9a3e88d52849ad. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBSMU7324342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504c64ac4e337c8b07a4a84d0f4863a647d727b44db6c36080c013d3bd3899c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHZ32170415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46488ccdfd301223dcb5899567c7305cb8f68980e8b675ab401ed3bf24d912c. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:45:56Z), 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/QZHZ32191680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313189f99c2ef9e92575d1b8df967950ce0812d8eec0097cbf994082877f04a3. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:39:46Z), 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/QZNJV2185779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f37c922f27db9fd2d6d43a025ee7dc92b5bbeb04605e70e9ea1b4dc3b4c5c9a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNJV2189998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392aa0363375fe6c60feac322796dc5cc0fec701a3182cc041a67bc3e49cb061. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNJX2161311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eff88411a0cbbc1e7e25788fe95a4f4e5dcd4660668c4bb99facbc4d7774fb. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/US7VG2239313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89ae5a7b7a8fea0c946b24226524e99ff8be546ee0b8d3dca3269f802a85650. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/QZGLM2216534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c177e154e2133fc3f091b3585ff71d2bd0f1a4c87292f2a98427435b752d20. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:38:47Z), 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/QZGLS2274722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63b63fbe62ed663a95f3c3082e5107ecae34656fe91539b05a092f74f4dde5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZW9M2276310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc8d0db607a9923fcfbee058dfabf6cd7a45b253695f196c2e05fbd9478003b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZW9M2254746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307a043f044dfe30d30f03fa9f76c3e8a38ef7b5072f47205eeb6c30935f0dc. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZGLM2355365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09241ce6a9fafa64c34addf43eb9913374f15ad238c519b24c8d01a2a7526fdd. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZNJV2338253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5811a42dba7daf59275494c101a26da8c046236bebbdbc366fa96a3ab208d212. Chain 2 (Bitcoin): anchored in block 957561 (2026-07-11T11:41:29Z), 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/QZMZ92406134.