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 0x717664a8f1b63c09de0c0ee2017e41f34f138fc46b9142cbfb58c814b71b21dd. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5765e79a-454b-41f1-b36a-886ba37290cd.json and https://artists.proofprofile.net/proofs/artist/5765e79a-454b-41f1-b36a-886ba37290cd.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 0x8b3333e6f5318680b487b281ca885f83c8f967e81bf8cfc84651a11e195adfb8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:05:45Z), 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/TCJPW2318242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a48391af55fc5e8b0b88c5840387e43113166d5190b08ab8f61caef089983c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPW2318250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f18ea7a4736618b8cb10dc61b6c6a355535605ba8da4db3741e685739ed455. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:24Z), 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/TCJPW2318266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3333e6f5318680b487b281ca885f83c8f967e81bf8cfc84651a11e195adfb8. 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/TCJPW2318242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad1c8c600782c210128b7713e27994ac820c9aea7d96bc2d114914992fd376. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCJPA2485051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8de09d89dc886b217b0cad638d00bc8fb1b9c13a42ef307f181f2ce4dfb5a7b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCJPZ2406250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bf364b1b243f5b244a1f213712fc390c178bd0c4a6af473be373cea2135fa2. 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/TCJPA2485070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f2a3f971734c99d914c1aa603ca3409aa75af533bc114dd80c118a3ea986ca. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:21Z), 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/JPWP02401840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071b224b424fadf46d35e33d2616109025d6f8264fff74a700fadfc1481140a7. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:45:59Z), 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/JPF302400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb192aa014703d5c1e46766b92ee0d2812e5a9722cb1062d7cec254283cfc055. 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/JPF302500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b10d05f31a234493393833744b5e5e7164256d311a917d81ed43c05596c7ea1. 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/JPF302500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487955341bf23baec201ad2184d2483a1a47162a548cc1b05e9279df6a7d44cc. 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/JPF302500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961680706ee1a76999c00651cf0e8a21a8f2caaa1d87778ff0f741323e32bf97. 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/JPF302500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf65c239a5143804e067dcb4ddba024ea30809e9fd5da95c9dd1a007a0e9c42e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPF302500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7c303d2db8d52c365fb080f88e8617a648495c019f4f1365a5ead540b2d735. 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/JPF302500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20485ba5318c0e0ff221272417cf7801ee7cb20c5f9b9420a65ad7958480b984. 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/JPF302500160.