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 0x80b80310ec6077fbe79c739c1ea4a8090765bcdcb9b3d083ad3a0680d8b04ca5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f509c431-a2a1-4d4a-9314-20b044fb2ff2.json and https://artists.proofprofile.net/proofs/artist/f509c431-a2a1-4d4a-9314-20b044fb2ff2.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 0x8ba55237f619ebb9e5e088b64df1403e6e704afa16cc3920bf57bbb7b7966230. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:14Z), 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/QMDA71855968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd48207d45fa92e691d1add176361857233e52c3f17124ad5e52f9c01bc3556. 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/QMDA71855967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421d02062db5a88a41e401303185d22b5c64207dca56730336bd8fc8b5933ab. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:26Z), 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/QMDA71854666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017610a63b831b38f015ebf553a4e77dbc24e05738b367e8abf0a5d7f30fa5db. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMDA71856428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2292c6f3b2d2e0c319981f2257cb51ba6494ff8edd7bf9032b49a2d166fabd13. 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/QMDA71856433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa756c3fc8b179db7e6c75f32e7fe00fa15f3788b80b890ba2740aa3b21a3b926. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:30Z), 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/QZDA81928974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dea0c4b6154dbc9b536acf63da7e8ae3835b8ce9a0e7b8a3d3656394ebebcd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:43Z), 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/QZES81956910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f35ad16f503c2201a62b2567a30c132761b2d1a602c915c0ec1611027c8b8d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES81956911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca60eb37f92ed87bc73e2163077fafcd3366c8f206b90005706ed1efade7723a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES81956912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ca3a84292f052d52a61e89dde4764afd4f55d20bef18d86a1b5731095bcdba. 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/QZES81956913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b346e13e39e6f987ce129fda6fdfffbfd3ac902eb4e103bc6f19dcca6311ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES81956915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c17d392c7267871882de89718be0bf28201678e02f5a2631640b9d8e7d5c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES81956916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a44484477573cf97d6350eaadcd538c71928eb953f9bed6e57236a03104a865. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES81956917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a03ccab09ffda2f8e602480412a464c42b2ea95ea2a1443fe03c27b9a20bd5d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES81956918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30455b9b03d06ecf6cb7c9f22aae63c837163ca8ddc324ef67e668eae9a29f5e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USUYG1305084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab7c9dafe5edb6dd7d39df84278823ab7870ce6778e0766c28d1879a67b6887. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USUYG1425170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247548aacff42345b5e68b6b3379efa9660c484066fe24a6f5753a2e38879c7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USUYG1506397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5f426866d7c1f559a065e0970959c4c3cea9e8daa5099aec9c775006ad2de2. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USUYG1561898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba864cbbdf02f0a74d10b25d1c7ee0ee987db2a4bc8a75e14768ef7b880faea5. 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/ES23S1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b758e22f163bc30b978f9d6a29aede082cb58e68c414d285fbd39ecec6b90c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES23S1600080.