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 0x0aff91e8fabd0e41715e97fbc843339139f110a79de74d3ad413ec9b05bca336. 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/a557f354-2c0e-40ec-b118-2203e2ff938b.json and https://artists.proofprofile.net/proofs/artist/a557f354-2c0e-40ec-b118-2203e2ff938b.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 0xd1d998c9bd16d12343e27f1e887aef7b46b903385f4bbb08afb32a19ce052a36. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAU2112356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb839ea583d114e8ed4f8e7901facd25fb301ed5ab7a3a3ec1116f6985c2a4d4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAU2112357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab55d720f2891cc50d47235618fe41703bffc630ae3bdbcdc765caa39bc5ee6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAU2112358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5803d9ec65e925a013effc333f0a91dafb2d41adf831dc4b735908b28afe1244. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2112359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3899c4f048d32476bf8682f8d8cbb068a62961c0d6aa6502b207becdc0cf96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2112360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec30217ce189a2f800f903f3d278e0b568defd6bd3f5d0aa3f61e0801ba140. 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/USUYG1346400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09a6334afd455619a5c9e955b534b664d7701f6aee1944d880df0f007e88739. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5957f85ba42d56ac361a9d169b6111d64efd4177cacb58fa2e26b92947229598. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b116f6fffbd085b2bc8f274739b9979b570dc56367bd0a2b33b97b6e0c0799. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc664f24f2c270d8d01f2957789b07a8446e0d83b102002c930b0e4faaba7f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1346404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b8c2f144466ad89c1acffec7f3f81f457ca0744298706c6b09b831b4344aec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8408628cb9086b37462eb0e5d45fd9df02fa69f4ea3865ce142a435c42d2f88c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61baf7ba7c09f67073a0deb863b9d4ae922d897d62ad22fa2fbe2bb249422f73. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUYG1346407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fb568360ab5dcbe73a10f841ceeacd5a79c67a66d3cfed2b83acc216d91cc3. 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/USUYG1346408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd699e3cfe1744d6e2a9209a474423c7c5644157cb36cc319c6701af79a8cb2c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1346409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc794a1bf88c369397e6db59a878f2f08ac6fa94d92da75edc6b7824d1841619a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1346410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910dbf01fc301faac55d739f1a0bcc323c123eef722e897050ee4972267ef06. 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/QZMEM2365628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a72155f10be6aa8c621d397542e77ab67480e955a8553c455a7c05a9f7b9f1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEM2365629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e945888ac9da2d02973dc0bfe4a23016a454ba650a9c14aa0e70ae5735478. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2365630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4dead781a98fb6e9ad60143b3d1731fe811271b147fe4ce129236491be2b34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEM2237259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d61652a18c0db3870201dcda034cdaa100ee1a2b702ce828407506a4ae74a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFU2134111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cb008637244b153f38bfe257c1cf0f541f5e1552c94532b04230a026fc1e53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFE2008307.