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 0xbc41dc260fa8560dab84865da2352aed0ea6ad375f666d43620d252bbccd267c. 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/a4658a44-93b2-42e3-83d1-5db8316fa050.json and https://artists.proofprofile.net/proofs/artist/a4658a44-93b2-42e3-83d1-5db8316fa050.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 0x5ac4d6cce6e6133cfbdfbd134ac90f0e25f0d6bb4b3274ac11f62805b492aced. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XW2136366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e57fc93302321e8d63ed1ab4f32c3d88cd22d9aa68c4b40ec6839a61bc00966. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:07Z), 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/SE6XW2136367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ce52ee8cf0a0e003b977cacca6d6bf82ff74c8f88186b26abb8ad7774783a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XW2136369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b5662735d22bd90da4266236e69a7128980d0860df4c55261064168a7709bc. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:52Z), 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/SE6XW2136370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633498b02f6bc63a099c1f6a61d2c9f9355fd68431589061ebbc0eed4669e264. 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/SE6XW2136372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b379f84af5bef1bd748ce73d47bae8219469eeeb804f0d1ce46fc0d804cc6b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/SE6XW2136373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381442fe5c66dfefdbce7a5a2cc2341948b0b89e20752faf7af2f2448460367e. 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/SE6XW2136701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c19f7b22c5c393c3a1d49a4b5f302049c34e8c1e49c2351ebe2e78ef916f6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:14Z), 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/SE6XW2136703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56699ac22ce8655954da8594b39150b17fe55539f66cb45aebebe1acd8ec54. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/SE6XW2136704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b99b52a842ec2dcc79de5d759e8f784aff736d013d5d68fa484481518e7f2a. 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/SE6XW2136705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d7d3c7923ec8ae0c1799ab1ae2528c2fcb7ca844c1a416443291e7df3ff02. 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/SE6XW2136706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ba53022ebeb2dfbd6fa7d3f71ad045597d5fbaba5370f0899caf4892d6ed1a. 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/SE6XW2136707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88dfec744e66ece5ee4c0464aa709f6853ebcb8381978962876f72c83cdc640. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/SE6XW2136708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e53cffd50fffa1a96aae9758c6368c17dd8c15cbca50a5acdcb3831b1b94249. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:24Z), 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/SE6XW2136709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605cdcdf99adce7c331795091f9aeb18f3b617d0831d773b6baec4b235a20ba0. 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/SE6XW2136711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6b9e58d73d00ed14b85f0d6856c3e3c4e607812d0ebdb520c6eba87b80e97. 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/SE6XW2136631.