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 0x91f64f55bb2768d47187197978f2a75635d34178c01d905826cb9950c704af1a. 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/d8af8dbd-baa2-4451-8b96-55a8a597c22a.json and https://artists.proofprofile.net/proofs/artist/d8af8dbd-baa2-4451-8b96-55a8a597c22a.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 0x3a60abf64d9091d171caf87f74a2729320f527f78a313c3df7a49b90cc3b5410. 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/US78T0504780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ae2c650e873b7162740b6b30e50721e9cf71f7a30bdf0db9f96b5bdf7d0947. 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/TCAFA2020602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ae2c650e873b7162740b6b30e50721e9cf71f7a30bdf0db9f96b5bdf7d0947. 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/TCAFA2020602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a75a176704091bd1e9ea40c2f00c4c648a777db0c137ff2d591d3593a0722e. 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/TCAFA2020601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6a0d966ee2cbf0f29d258c6ed22e12a3b767aeb7975f66ea10448038d87d4f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAFA2020627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8cf1cba9144d8065223492e3059c3c8830cc933819ab7483fbf49022aa27ca. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:19:46Z), 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/TCAFA2020581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92edf70b9ecc57abd7f13ebbe0c8dd26343f804e216ff135a295f9241982729d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFA2020618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909469bdff7efff59067050b93e0922bd97549430020153310115fde1d74948d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAFA2020622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14f00481c51013d4b7552ea42073e17cfbc89be5aa030d53a0c5c94bebc02bf. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:43Z), 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/TCAFA2020633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92edf70b9ecc57abd7f13ebbe0c8dd26343f804e216ff135a295f9241982729d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAFA2020618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909469bdff7efff59067050b93e0922bd97549430020153310115fde1d74948d. 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/TCAFA2020622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d236e8f08501a32885eaedccf0e93512cf894d875947df5994f2f1413b557c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:10Z), 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/TCAFA2020639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d60710b55da80abaa08ab7a5739f2279e8ed7bd29d4a33d75908451b91d7d55. 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/QZN882253828.