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 0x257c15423f2e70cb48c9c659cf2f856497a9a8d12ee7a9a64f6fab1835052b30. 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/353bde77-492b-48d0-9394-c5b212a7e3dc.json and https://artists.proofprofile.net/proofs/artist/353bde77-492b-48d0-9394-c5b212a7e3dc.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 0x6a74eb794a519cf5b19bb2ab70b10cac24013efb50effdbf87514a6f1ce77b08. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/CH6542489528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5667a20366dcac8c5ec5546f9f87cf394faf7a92e63a392271b0f0f54d7733a9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6542489520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98609e25a74e2b490e7f87155d4b45b93fdb6d0628378611f2b07916867c898b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/CH6542489524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bebc1f0ae9815e6eee564795b5eed6213ecfa9b35daa4f2f707ac702f73cea. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6542489527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a74eb794a519cf5b19bb2ab70b10cac24013efb50effdbf87514a6f1ce77b08. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CH6542489528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792c7346f6d5e3d82e01ebe0e6c897d3f5fe16e838a85cb5e83fdf084df5d537. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CH6542489530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad78a505005b5159af270e5029b54ae06b13df3ae4800ad057d84386017ca6c. 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/TCAJL2573662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1f50dbc3a838b9cf06c35ecd5c2018fb38aead23cadab018aeabd3af6fd70f. 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/TCAJL2573676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808baa2b2b67d818dd9dc03d9050b04566b059d6461ff395658d22f6af8d23c. 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/TCAJL2573688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44942fa7e5dda419763b12ad74d7f6eccae056f846d3001b8b1222124bfb7d44. 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/TCAJL2573702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02740cef986142ddaa1a68857c20b96f8d9937a73917588d463a1874c4e6eb7e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:17Z), 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/TCAJL2573715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86950f89e86d02ef71f4becb395fd8549f9df7705b428d6fd18fa4c3aeae9c41. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:15:30Z), 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/TCAJL2573784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ebbb279a10af53db9f63f79320a39360c56c4611c9cf6821145f7ac7cd2e7. 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/TCAJL2573797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46c1564e0946ce6dd05cbba21153720a5016ae160427f878a078ede78b26bc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJL2573806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13136c897deaf3ec13b85396ba6407dc390ab9fb64d41a45e0b5dcd589abb1a3. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCAJL2573823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c1c672234982204d428cabcda3ad46736658c66878bc71fbfd1c756adafd13. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:09Z), 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/TCAJL2573846.