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 0x17fc4b9c77bb08bc6e743238df74431ca6b4c3a4173230c15583f0618caa014e. 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/ace81659-6770-4876-a99d-ea9cec002632.json and https://artists.proofprofile.net/proofs/artist/ace81659-6770-4876-a99d-ea9cec002632.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 0xa213b5a733c57e2cbe6860fb99d05de9488451acc0528bed9e0ec4652992a197. 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/QZZ7T2480066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93275dba21dd5b4fff7b105059c5310648356d0cba7854b70586ed2a1e8808a4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:14Z), 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/QZZ7T2480067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c18bc3357df3f977d73d997a7db26c16ebc888962c2aefe486683858af9d8e2. 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/QZZ7T2480070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fadb7a5ac8053fe05ec28d5f5df7c0142ba9a93739d4659b00f1aae1b758ba. 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/QZFYY2549093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1075f9500b6f91442c0235a846b745612aa6259cbccc5390a7caa3915ee52425. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFYY2549094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a135d093a9d788a3a2077eb4ea3edb2e26a44d8aa37059ce9dc372fac7438af. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYY2549095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffd1e78d1db241d160771380b41de8b490855b4c1ea7050d3e88a88437f0020. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZFYY2549096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5787394a01e9ab563d804827251dfe6954016610d4e31d02179dac98dd579e2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:56Z), 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/QZFYY2549097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0de923bfafba6cb76b728b2ac2925b825a5c24a37de8decbe60a370f9ff8e3. 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/QZFYY2549099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fed4477b632506db109a518dc084b31f15cc7d660819f7657cd42f550a3382b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZES82573265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d0c38e148d8d95bf1c90fdfbb47e95cad13ffdf83fb7075bbd9cdaa3a7327. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AT1962500530.