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 0x070c579a50d26fc84d3192216e1e6582c3611db111c2ba17394441a4a4fb2942. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86de64e9-baf1-4011-b2a5-7b7bd3e8f65c.json and https://artists.proofprofile.net/proofs/artist/86de64e9-baf1-4011-b2a5-7b7bd3e8f65c.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 0x87e5a8293754f1ab3a84cb950a72aab2c948244015e1cb51381cabaf40bbebf2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRX452151361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b5a924bf32b5b8e4c6907fe9fc34665f63ac7cd94ab483dc3cfa614343076. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:24:24Z), 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/FRX872154920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9054ca3fea34a2fe0306fe6e14dd6c5ec93d0e3b0229aaf87b5e9396f49bc51. 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/FRX282249335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5269b6b2740bfa152c5d22f448579dfa128797bd8feef79cec05f77c5847de35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPLR2243773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8b107c9bb94241e8994ac039095e90b2a8d523846d13f0f4fba0d15a8a98e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282359495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b2c18a9c0dc1011807cdd37e6356784578c6ebd9a2417361c0cf10f0b52881. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX452121802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed12de83ea4b30233a5a486467b7537e45840b0f2b3cc896f6c27920182e0b3a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282188460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa737cf5c0aa0ffc76753e59ee9bce0d33a8d36acdf4a7f18cfdb68a364295cee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX452121805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed3c2b50486ba1a5a5ab267d9e849e6a12c02caef4109b0a837a9ba45b99ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX452121806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74a8f8ac33c86f851508090c2277fc9057e6bdc49558c0ee19ea8f3d819f138. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX452121807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8b107c9bb94241e8994ac039095e90b2a8d523846d13f0f4fba0d15a8a98e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX282359495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59786040b5aedb8b7cb0d15233dcdec53dbbff149911b84d06c904c8588d66fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP42264642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d856171be2c8879fe90f9677f4f133ce1d19661f6b23daa461584265b69ad5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2239176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcdb35bb7f23d6f04a7aa34cb126bc1ae75e820672d183e6b779ba77814711c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRS182112778.