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 0x7e68ff1ef7418ed90a5784f9fff3b4e413185a18a9783cccedb488110c61d531. 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/34eaff1a-7704-4e6d-9a73-aaf646b5834b.json and https://artists.proofprofile.net/proofs/artist/34eaff1a-7704-4e6d-9a73-aaf646b5834b.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 0x4493553c03d5b72e2ef7461c5cc0480c42dc8af5d7be5a1c79319ddb46aacc7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPYN2475057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe241dcd296986b15dddfe08af13800439dd45432a90c0509db933b4b542e8673. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ING212404572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a0c5fbed3830bf00dc5c3d2e5639e92fa3930db0955ec3514d568e2c92dc1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0P2464690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5695df65fd3ccd658460f88cc45577147ede22f5cffebfdc7d23fe333eb77f6f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPYN2496343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59a8d5e150e16d0f0e84928fdbada5185d71bb66726f2d26b08d5a1f0930366. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INN242432160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3695e7e231b5ebb19250969844127202e829b43c056bfd389bdcef3c587cf5fb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/INN242435369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abcbb2c30ebee401a63a9d0072d9238b9a05541930119ef641780290fe4eaa7. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/ESA012521655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceea5477e458fcce8bec9024a6614adafa97131a6d0d8d090ce0573fbf6fd4b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ432394972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa4ad4b73902c9694bde12c331c695e7ce3703c72ea28ccea969c305ef33702. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FR2X42556613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088dae7dbbab115d996588a37ead1fc1e0ca5a191dbd8ffb930a883129624d99. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:32Z), 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/INSF32509579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa917d068e5601407379116e6d0667c73e078f689e4d81798284027a6b404f75a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ432426286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d21210657b55e59967b3300334a2d46212d058c4662c1803f81b4f991faad. 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/INN242519807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83f81bbb6dfe96c8d1640a13c06e46af777fda20772a77d53f975c8350ef35. 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/INU252522464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f7579e90dc4af9fc07d45fb79e87b8daa00d4cf07e6d8a5ef13016b0de247e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ING212534996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82984f648c4868c74d212072a99955f5c35d44cc2eb2bc8b8a1046d42467950b. 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/DGA052583929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfe5d46cad558d3a4e0cf55136336d08d75505ddc6866d3e0c23d467ab5d544. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/INN242544890.