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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842e289303a8ba556ffd146bd99045be692c61bc406820abe37bff669792089. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ea761d4-14e4-4ac8-993b-ca93b09e81f6.json and https://artists.proofprofile.net/proofs/artist/7ea761d4-14e4-4ac8-993b-ca93b09e81f6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c41659f8eebc75d9b234c5b1017dc74f3dad34e63cd47725b8a463ce624fd02. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/CAENV2522916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426d80b066ca2989780e2066ccf9fbee0e454cbb73c40d7fe3c430d9924fda47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAENV2522926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e6f7340cd15b3890f4826ddb5a27b66d7387e297a648a74969b2bd5b1d980. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CAENV2522924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63aa96b08f47eddccbf76b911622cba35acf6e02d146a56f92dc457a61e3bb16. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CAENV2522928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d56fef8a0e38374c8444d2b7e12754b154fc03ebedeab3db645731c26e5f90. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAENV2522911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef857f2c90fe7de546784c815a79c9b0dcb7993fc8fff94c8dee0d0f448ed9c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAENV2522925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa9b784555c9c8a532c1e1d7b68bcf9fbd4a3c58b6720d6d612ef5b8cd66165. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/CAENV2522917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f89c428c32b6f15570f224b547a9e0cc200d5638d3398b820ac22815695f189. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CAENV2522919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf4985ad4a2b9a7609f5cc9c0dc8976f252ece8f373d51fa79a7d7ba15e8dd. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CAENV2522921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ce89723b03e0f5c3261c7c85a65f7441424e3e1ed91e887e2a79d102b9fbe. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CAENV2522920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f678ae13484f4bfd74fd4252d203404e1c44692a14b8ee7b7fcd8f86bced1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAENV2522923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaef1d07873a6b9d927145233119e569dea860e250ddb210e80e7e3a0faf3fa7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAENV2522918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2dbce0e6e37178340cea07671c17ee7974781fec8698f78f6bdac15d5c90ea. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CAENV2522915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd761e0453ad39d9a253d0d1f4d6c6c8407691436e3b7aeaf2336ddd7e528b263. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CAENV2522927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6255db1e76b8a1bd74e57dc79f5f1c2949fcb9f3aedcf845040b9ef32c55a64. 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/CAENV2522922.