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 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 0x8f62da72bf02f9f589c6541e92f1c0bf0f885d2ee7a84b9706f552fefc6e2761. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47e2bd72-2057-4acf-85bd-96471dba7fb6.json and https://artists.proofprofile.net/proofs/artist/47e2bd72-2057-4acf-85bd-96471dba7fb6.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 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 0x0ed96e6244640a49cb9f0a28e1769989dc51291a0ad7ea5579696fa3e1913def. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DKRU42200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf825e3c5d8974f07e328f4b9f45212e62de827a608213962ae4a8146ef34d8e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DKRU42301801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c6cf793cb2752b6d1147f5bc78be891fe2baa2039bd95944b0c09aec3d3df. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DKRU42400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe830d9a1672f61ea96cd40c2b4a306a29b7267f81fa571e2635d2ee5c7171. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DKRU42400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ba41c89af5e75443dba08125f20c9de8327e496996090696ecc14a2b20d57d. 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/DKRU42400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb9adabb5fccea4b9f1d1e4692c7a9e6785d14275c268dafdf19360a270b69d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DKRU42400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb837f581ec9ff63a2f83d192442f0ccd97e75667eb36f6d3f84b8f91109baca9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DKRU42400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e57716d27011d5ca9e4c574678b5871f03e04ac78707bd5982ad37f8d199f9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DKRU42400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0926d63fd111e40df94cb373c3f06d228166725b8c06f3b2b58e01471ba8f9. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DKRU42301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6f2004093e6b56c9aec71123511c887b5b63d1fe78f57bc68ac4c33204720. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DKRU42400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bb52578d3a5a0404174f15ba8359de3af8c95116f87cd91a0afe50e3cc0501. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DKRU42400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c1961dd5cf309cfe8a45b2ddbc1b7143b37603ad624ce2c688d46773088761. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DKRU42400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4c6cf793cb2752b6d1147f5bc78be891fe2baa2039bd95944b0c09aec3d3df. 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/DKRU42400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9569b8d3ed3839f84ef53770a68445f6e984795f37f09f53e08e59b9e5afba0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKRU42400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd300a1dd2e3e80bff7eded86b010acb660e7ca078f739202f717f1d7ef52ea08. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DKUM72200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e4a5a658fc801f9510c0b42184a405cf53dd09f01eb0826073bc6b0f84d47. 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/FRX202111927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0557f241c15e5651ea5c5af6d03aacdd05cdee68ae9974d17135a5254efad5c4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA052291443.