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 0x565c248a493c397bbed212dfa402c1d20b83f4fbb51952b87660918feaf55735. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fb32431-b6d6-46e3-9f4d-3aba8beed3df.json and https://artists.proofprofile.net/proofs/artist/8fb32431-b6d6-46e3-9f4d-3aba8beed3df.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 0xe25705606695cf57a22429c5bf699044f6f7eb92e06e599b5f174814ba505bb6. 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/NO26K2406020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb210daa8979f595f1f0fbcc12fd05f127584bbc48543d295629eced9bc4085. 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/NO26K2406030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625e477efb568d8055dac178ff48517915d35749fdf6b67334ae165738c43d52. 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/NO26K2406040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8355bd395cbaec4ec1bc7101d36f8908c50020a88852b731a500a05303dcd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:56:32Z), 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/NO26K2406080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d59463eeb543b20795994ae28d6d3cabd691fe882815e0e2d6facf87503f55. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NO26K2406010.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1161ccdbb4bed1fb044fd789ada9d7553b1952d4a6ae4ecb0f82227cf3cb5b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NO26K2406050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7202a9fa3220ee3a4811de135d76ffa5f1dbac2ad404302ad67ecf658257f3e3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NO26K2406060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b8a2e82a641c6f4f9750b5b1ad77d29954ce47831697e1be8e6b7d116b1d43. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NO26K2406090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee2931f7f411c15d44d2613731355ff6869ffe9e462e7dab46d8a7131cff82a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/NO26K2406100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5715f895d4d62b849e2e8eb7e189ddc31cd9fe4319f13d21477613ea2156c273. 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/NO2U82102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b57c9ccaa3a7299714074bdcc5ff1c732cd2c369e398278ba369205f2fb93b. 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/NO2U82102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec6d7cf6cb93f265eab325b0cfa67c5248bae9431bd0bba24746730b1b50ccf. 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/NO2U82102030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634bdb1698c14522ee9534280bea67e88b14cc2e903b36e6cec06fd4741bd586. 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/NO2U82102040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b3214cf597f7f0a1ef449ec12f00f21a490e842106ba5f9e9d2c775315938. 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/NO2U82102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2e42dccbc9fca0917f7a0ef0ceed0e0f073865bba91c123e0f8fab805abb76. 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/NO2U82102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd51deeb928efb2f3cb969d9dcdec121f3e2d979eceecf628e1aaa9dd84f64c. 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/NO2U82102090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62622685b44f2fa3dc3ef706cf5931f1bf28e516685b65980dadcf758f564b. 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/NO2U82102100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85b66440fa724cc9c500f5ed54a23c55accb14f82ef5b1841d4f151089eecb. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NO2U82102080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5a5d8bddf96c7737683b3f04154ed73216e25936bde4b10043e26d1f2d07c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NO2U82102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542dcdec0ab3c9149e8b9a2221bacb6a75c03d34ff03d85fa00bb9d2bac8b028. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NO2U82102120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe181413a18f23c1eac42927c07bd3c73c21f5d3882eacefa6c415171dfb0930f. 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/NO2U82001130.