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 0xc0a8950424751ef7b84e9e507e4f3505f18224d61d19edb2e71efd7f5ab4be66. 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/978e87e0-94a4-44bf-8f9d-151c2c90df8a.json and https://artists.proofprofile.net/proofs/artist/978e87e0-94a4-44bf-8f9d-151c2c90df8a.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 0x280c1c4a340a9b74aaa8157b314b39e57eb07d84887f25db6c0a70a53f56ad3a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6P2402357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc81a7c43ba7b8f89c929a61d5f00f353aba167ef18aae7c4cf3852cf0a50788. 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/QZTB82423926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5c58c13279d2136a16f11b5e76b476be86fb3001433513c90731dbac746d1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTB82423929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15def7e81466dec292b1a982cc19587d01aed8d9ae793c73ba5cd5071c1d4cd. 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/QZTBC2489472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f868ea6f16c8f1f6f5ce2eaff27069d011438b96c1acd0909ca000436c72c6. 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/QZWFP2457402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5210dbd9be553d4eaa7243f0e199cb14ef8175b6b399fbc01d94359c3b6a0. 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/QZWFR2435483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202986044b975d63425522283ff7c2a2a2c87be7d87f899606eec47cec3901c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:43:37Z), 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/QZWFQ2419951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267a8e513faf8801a76bf569df281e6d2412ca1a9f7539a21a340f9b71132a73. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZWFR2427950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3034a15e7a8b07c31540837fc4cc3c7920280698250ecf4d0ee3baed8ae4d9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZZ7R2457362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c42ed84ab7e6c6d8af5f1dea36274d46734adbd820eb2039eed6b5d439d240. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:23:37Z), 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/QZDA72537192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1d3e727071385f10c01c259c8a626dfe600d832a7ac58102b84fa6adaf436. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLD91773653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1d3e727071385f10c01c259c8a626dfe600d832a7ac58102b84fa6adaf436. 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/USLD91773653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8bdae6b5b13c017acb423c9c2a06ecf00feff2582dc77d1b823009b0518a0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USLD91774911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973d1ba347ab214bad29e4a0235376bc1c75a88022537241cce0248d78a96f2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91774913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08945725fb3495cd2f8c898bb833e563aef19d875da4cad5a93888027246a58. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLD91774917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1d05662578199cbc00ad4b4b4045a176893ed7441aafac3e46a5cc2c1c2532. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLD91774920.