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 0x0cb1c122363897e14d607dbf1296701652a12bcf7f71bf459b2e933cb1427a63. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aa3165a-ed71-46e3-b351-c4d3f2e311d4.json and https://artists.proofprofile.net/proofs/artist/0aa3165a-ed71-46e3-b351-c4d3f2e311d4.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 0x88ebb5722d53907d69161bc2f687792506a1fe2ae8c665b3d86b0e481b4aef35. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJZ2258453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efec610b84590f3d7ff7537488404acde240aa4a5dd0136965a3218d91d66be. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNJZ2258454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fcc9aaf73127f39baf7e56968f871a7074bccbc0e1905bc1eab9aa13f2dd9b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJZ2258461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156fcedb7b9e60a3503f2a9cc3f944cc605a76295989be2fe73f88602f4f2a2d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZW9N2242428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1367b325f1ebcf8904228098b87e75f9c9d511971280067ea77eab8f83188e44. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGLS2321447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7642c9611833100c59fa26927c34307da7b172a8c0de81aafc0576d74d6f3714. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZGLS2321448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea5d0fe2f114cd60d43fb236ce69394959f6cad0333ef620f320a43def3fcd8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:06Z), 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/QZGLS2321450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe920291a2b47f98ff3df5b48466a74dfff2925ebc8a52eda24809915d9b4a4bb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTVM2335033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4ab93918c2618b1e9678abd1984ebe0372c4e14d6213bc326afa8737a9c2e3. 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/QZGLM2450158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa1062f902b60d1373b06fbc08605347d683562848e38bd04ce0716c91a094b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:44Z), 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/QZNJY2480375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c955a3a95b67b266868a7fc06fc50b53747bf7773c1bf20036600c0dfec45. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:36Z), 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/QZNJY2480378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3374537439eefc4bbc405f57446bdeb579f26d086d5d2e487e91ff31a3cfe961. 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/QZGLM2528450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6276aa6b0a3f0866521151b60f57728e0f037b9f8c0b951df50888473ccd140. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLS2528758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c43f84fc6095f871368e394ae3f84ce14d8f6f5d72609497a9e9135d21948b. 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/QZNJZ2509202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7924e196d6f887b5928ba3d8e3d78f384d00da5dd7217522c8f1c160d2a32c7. 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/QZNJZ2509204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201948de6042ca9853ac7622d539284081e860f5ca6c05eabfe3f9ca43410c2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:41:43Z), 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/QZNJZ2509205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b547ad8b0da7f132a965ecdd7fb105fb089e97c421b37eb5a88513c4bbdfb4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNJZ2509206.