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 0x71fe45ba01be9832b066e902fbbb18a34bc580952b7a195217c4284636d116f7. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea49ad16-af4b-4bf6-be17-3ad6db9fd018.json and https://artists.proofprofile.net/proofs/artist/ea49ad16-af4b-4bf6-be17-3ad6db9fd018.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 0x81a8a5e1f77e44ed1fe95d4d8a4a4e257e4f314ff77aaa01dad3e433517653bf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA72418422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924974746b741455fdbe30937ec435338c51a0d8bef271c03fd5d26882a6def6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:20Z), 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/QZTAU2427318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e718c3e58ddc079dc540dc180ad65e1b0b7cd86a16a628fa20ce27dd1356a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTAU2405448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663b146c71a61557a8b42489beb56232c197e12c13d2fb6dd30c28ea16d262b4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTAU2403853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8a03f56ec9c88a59e49abd2f31e6b8a06583c4631f066d94d74490c2b6400f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ62514342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d2a67387736d1ad4c5bee6daff13eea091cc977f17ad17830866c2abbfca37. 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/QZFZ62514343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487e7f4f00874f6f72d51bcb625003c7ab288ee3559abf4ac6197d9c92671e20. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFZ62514344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee9cd31956357876bcf5c7743fd3f50d8e7c1f91824b346900a54a7d6409bb8. 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/QZFZ62514345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8360e27ec99ae661218e350345a520790120d06954a4de488b955201ec91b382. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62514346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736b12371f6b0464bc6ac7be50864173f67e85149d3ee542e72f949ed001f94. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ62514347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55798ffb0492c98dfd73b0e153751eef910f9180086bc60afe002d947c48baf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFZ62514348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe94bb163d74034227dd963e770091b68d392cd390f576a99df431c204d489. 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/QZFZ62514349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaf8f1c89b01688465e2273b3345bf0c249c02b7e57d2a68cda310c9803d01f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ62514351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48bad72fb9d9d4b236538338a45fc75e14e3c38b6d2b1380d0162ae3d01d14. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZFZ62514353.