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 0x755b4d3c0f8758fee95ee09389a9006cfab494d3fbccb3bad67bdcff72620f5a. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11bf8a15-0b06-49d5-9d57-78fd4b9ea8ec.json and https://artists.proofprofile.net/proofs/artist/11bf8a15-0b06-49d5-9d57-78fd4b9ea8ec.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 0xd36012518a0ff456eac886666108397251e8070b2353b013350742090ae5d39f. 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/QZES71981887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2afc0c698fa78a4c151766c3a7c69d9b200ffbd5c9e96ef3a8e848823934b5d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:12Z), 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/QZES71981888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ecba01274bb30aa113d82d79f19a7ef267b2bcebb6daab959bc27527bfad82. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZES71981889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a868eaeaf30514d0ab235af3326490792aac4a0d8b81be9bccbe182b87e8a2. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZES71981891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90855346272264767bf49e9a51dac246c6a2b3615ddae979eb5775e412de3381. 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/QZES71981892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8665145a69e46ee19ff9c4a60b8788a8030cac98bdc6e7fa244957d0e35f993a. 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/QZES71981893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0867ac56bf161ccc4d477ac474a6dd79b263e65a192d234eab1a74a8931c86. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES71981894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd06cfc98eb0661adfb463b7cea7d6a0c217edce116069b9147afeabaaa1c238. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZES71981895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a597574760d3b77a3512fd9b1812d9c06d8738111ccb84c39395250242f96a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ72486160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e67f0b5d727f9c5b8d8a6a6a973200d470b8efcb4c403997017bbaacd7c48. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72486161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa7d4dd9137e4179e18c8f0fa0edfc4b871fdb70a82c3ecdbe6e4751ca00e8a. 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/QZFZ72486162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c89f25c7113b3508e2ac4048753550b2f9ad40c834e02b01e5b3dd90459fbf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:51:30Z), 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/QZFZ72486163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30e5704be1bdac61f33af0f5a77e4ff315a44d1595eb4c6e15cf63c57670c9a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ72486164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608be53d2cafb08c9e1595b898cde41112d5bd31f1aa7df77d806d79cffe1107. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZFZ72486165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ba478137378dac123c73cdba64114b92f3551173a6b9b55f15dbfd613f301. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ72486166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a801d802da8b2bdff026b99a9ffba8ab22f62d4909c4aba3c5ff3348dbc570. 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/QZFZ72486167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7cafe2b5fa38abe6deeeab72f701c6a0adc67605d59be3ddf2d31e681fe0f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ72486168.