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 0xbe7fb2f9e87aad84d9b3242cf452285ea1f6d2a4da80900c4845f3cd5bee2f49. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf7b8d9d-97e3-4b95-92cf-e4b9a20988ee.json and https://artists.proofprofile.net/proofs/artist/cf7b8d9d-97e3-4b95-92cf-e4b9a20988ee.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 0xafd51d8a5c73d7c956d5588f2da2110e752c3ef9135e32ccb59ba4dbd5695cd4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPW462100799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84906548bc2d37e7d2d2cfbf33f57eda8df6875730788c88d8485fb54cc452ef. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JPW462106250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaea450600a52bf3b78ba470e1e6dc24aa029ca1ccaeab85cf8a3c133aacce1b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPW462106251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23b861054bd96ba890d9f05da9b1e8d8cfe26a0d024a8af2ad3f550ee3219ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:53:14Z), 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/JPW462106252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233f11e80f018f3aea6159a74029925b1ce7a0f9bc02902ef3c57e256386bb3b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:19Z), 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/JPW462106253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f862af7358554612e6f74b1d9449ef12181a6d49988ab6cc524db27cbb5f0. 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/JPW462323459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90886bcae1e020d013ff08ec17c871f7407feab32a9a090eff2446eee393c95b. 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/JPW462323463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a566066bf27491694bb6d781351bbda484756b8768ee4ea34d2b4b32ce3dfb. 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/JPW462323464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed417c03a2383cfe633da94300d92f68e660e9915b5d562c4b1fd1e8bfd04cbb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPW462323465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a55f9475063885679db206cc2645f42d9204c05e07087557480f05de51a07a. 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/TCJPY2320491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290ab45b1901578bde5fdd28b059259d281d22ac18b20901b5889efba92f4a9d. 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/TCJPY2320499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7695bbc18bf00a589859d556b39a9e361861e3b6def486c5a35f2e05aa57ea6a. 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/TCJPY2320526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2ebbe45936723637564a9ab1ffa1940bc6ba5c483bd178e1b58c4044d9669. 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/TCJPY2320533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e6b5101b7a8ff2c6058db5c6caaf44f41a9340907be9896b7dca10e013da25. 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/TCJPY2320557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3ebddb79167f347e0a128aff6d46fdf69f6589b96a8290d07e864a2a61c6f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPY2320569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b9f667fd8076c21283aa6e994cacac3b1f86b7941f3af8e3ec4f96f61e9eb3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCJPY2320573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a07f91768f10bd0bf2cb54f52df9cb2b704d1095272e4ba011fbbad845557f. 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/TCJPY2320575.