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 0x713a6a9960c0ec2872239f5185da53e86dda572ca7b615efe7981808efc4fd25. 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/85d58234-79e1-41d3-b69a-8132ec8bcec1.json and https://artists.proofprofile.net/proofs/artist/85d58234-79e1-41d3-b69a-8132ec8bcec1.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 0x34a174db40a153bf1d210a0dd0abebb61567e0e3ed94abf9787b1910ce7ae2cb. 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/DEY472080780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9082ebb4370a681d88e1f2de9812cb47a2ca9e316e917dcc01d2dca406950f54. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEY472080777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205d3c45a8c9f41434465a26d805e7fc1b505df3b00e408c25a523e00f5d464. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:14Z), 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/DEY472080778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5cd88b40482d349abe70979546698c41783a68d1d33c821b0a3f76acdea5ae. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/DEY472080779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1749efb1c849bb1bd5c564841dd9770fc79a458c214ba528f7a48bd2fe86f954. 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/US83Z2043265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123bd445a441136681f17a65209a8fb12d2a52de997d59abe3d99cd2d018573d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US83Z2044097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7e52ccb98be7b991ac77835a7217e12b71057b3dafc18175cc118b4968d1c0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US83Z2044092.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d94077648fef4484663defd44e09334f465974b6f4c84e5a1e6718f87a811. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/US83Z2044095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bebe17edfab3e850618923c81cb9eedbeb4bb3bda439b40b391e49202dc330. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/US83Z2044096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46061ac583d01b943a62758e86b0485d6416069e10da06d53e5f146d3b232428. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/US83Z2044094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03cf7c00669733992ece807f877d00729b60a848e77086ec1d0af7a2e7822cc. 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/NL5BT2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9675062506417b29ede54b4ff57de46f0d13397f409b0b2f091c07138a35b9ed. 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/US83Z2128669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2c60eb6e53edf407191efbb236dac22503cf3b3769c62fd00eb0fa2bf462d0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:50Z), 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/NLRD52025419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890e6ff7afd8fea9ec2cc911140d24308c8e1eabd6bda324b6ffaf17043cd624. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLRD52025418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8671b6bba94ac73225e302fd64b7882a8c54008de42f615396b82c81755765df. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:24Z), 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/NLRD52025421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a05c0fa8620837b3f8ee116afbb7feed6fb1527f64a91927377c8a5641c3074. 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/DEZC62338119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aac3a574d12bf1a6788a1168c51a3c995f9abd745a1e815b407ac986d5a345d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:50:21Z), 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/DEH742502107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2423cbe8c39cb40472af6b2a85eedb9fbba78c19bc924f28387f7b9c731a299f. 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/DEH742304376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782cbf7835c3e2e0541904ee63295c6c8c72414d65fd8d0fb4ef8a602497142. 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/US83Z2130371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8733cfd03cd648ae29b552ddbd7b7cff5ab99b765debb152efd90ffdb1b8f8e6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US83Z2105069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d6639676089079364dcdc5a9d57521697755471305e1dba2b9cbca0911c88d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEY472088518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc2b7dcf9114e6de0b9b9f04d7835e989e24f80108aa4bfe34114374ab5dfb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US83Z2023860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6645764559c7d1c145518814add7a2a2e3aa89f0498e35bf833a3655f766acf2. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM6P42229086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224fcf5f7cb831a458e5dc8677ba66076fb455e0d9c6673ed59c0b7240f26691. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2318661.