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 0xe802960ca5947e635092ef2babc2f795212ed823b19a91c3cffd27fa250f4552. 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/89d07e3a-1f10-482c-91d1-100f38d67856.json and https://artists.proofprofile.net/proofs/artist/89d07e3a-1f10-482c-91d1-100f38d67856.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 0x35819af416de009a31e07d15d810f7111d6ac79b7d18998a07960ceaefb1e932. 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/FRX872337564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b71cbbef3563fbed89e95795f02493dca193dc6430582820d4cb4bb09bed65. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:01Z), 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/QZMHP2324258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515308b9ff78935d6452e4f57d88ad2bc572713c1a4d94a02b8ba305f1dc279a. 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/QZS632371647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde143a8b7222557afa2e19b3a6062262a190d5fd46a89f154cae9e76796fb529. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAHY2412588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af0e53b9b3dd9b00f3a1f6916bcb2c31996c1462e3c4b5f7d43475d08ccddd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHR2309913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd486a5a1c7f2493898bafc6add519175749ad4fde8f5bafac2be8419addeeb49. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCAIR2454395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a32a0ce20bd6d50c4d0beeada9715586c9943064a2f49204b84639193a6853a. 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/TCAJC2429300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f72cade16ccf01d00bc70e347cdf7d4b6b9fc4aabc65c5e5d63038bbac1bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJC2429381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebe67982ee245d57a3409ba13dd16740326c0d26c33b583e6bef618a39cf383. 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/TCAJC2429397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05eed89b01acd18345473a9f20978947d5e4c324c43071ae8c6580a93296f53. 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/TCAJC2429594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ba593ad2d033b27c4ce3608f1bddc37d685fc3cbbee4433e1feb51d6651474. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:54:50Z), 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/TCAJC2429474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb019d21f6cc47383f6c814ffdf722d148d0ba9f7c55df391fe8a679f72a99e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:29:03Z), 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/TCAJC2429458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f56c42cbb63b5c49ece71943c2a8596920698c0c508925022a06cdfc92ac7. 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/QZNWY2315441.