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 0xf6f4b35bff9206f8eec4a4dbed825d8435b3764dcda1c103d40eab94c231a073. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d93e65b1-0224-41bd-bc1d-ae000b91aa2d.json and https://artists.proofprofile.net/proofs/artist/d93e65b1-0224-41bd-bc1d-ae000b91aa2d.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 0x57c5ab09a6609c5f011e115c1f889d9c41023bf2b114a99add3939ce3e37ee5a. 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/BRACT0900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fc9de6253db63ed563ba7bcab2e28f2f54eac808af60fcb5916fe5df03c65. 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/BRACT0700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf976844da0b9ec4edc239c2825a15360852758ef5362ecc48ee834ed5fca0e96. 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/BRACT0900889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5541e2da08df15595f8bc536d00f282a1c756837fb4a70f3ccf2c497d4c6fe3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:52:23Z), 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/BRACT0900884.
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 0x492bb9932495cebcab5b347bc56cd58259db7114a4b950163ece4b273be5bebe. 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/BRACT0400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b6266b1d7a3bd955e94e66796a592d3dc770006283935dc0d3bb169c2e34c1. 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/BRACT0400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b652941acc51f83e2f6be86a60606c60f7fb9fe5f8fe1437beae538b27ef2bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRACT0400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148e0ea145457b6a36fce0d46c448fde0fd0f610f9224eba80e64483832b2c7. 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/BRACT0400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd720b2e8e279f72318b8f07a6b97d10291f78a463055814d73acfffd138915d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRACT0400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd35dd7c1d310a6ddb7e13c118db5be5ec8860d0f7dd0526573dc84b2ab9666b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRACT0400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac1060d293ea62483120f7d02fb4e5ceeb65d013f943cbc31e1103b456f5be. 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/BRACT0400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9bfdaf6671e6e41e9563fb1c7994082688360813ab72514177d9fefbc8cc96. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRACT0400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73bf89d9d7124e4363d738967b256a8de27bc11c56690f212b097a38fb7f811. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRACT0400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353cc63d5135ba4e4da975d5e22b211412f91fcb70a3991aa6c61d3cd519d410. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRACT0400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ef77ebe1ffc58dbdbe54b685c5d468fb3793afdf34138ee349452567cfd68. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRACT0400480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8558f3f0eb06eb2af304e930d8b8e7af93b745830d583f3f20cf4527bd729985. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRACT0400483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb863b90d2f2bc0e2918370445f0e6bb6cde111ca0fb5a74c535fe907c98c0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9M2403727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe5223fc79024703bb07dd8532a501d50fc851712e63e64365aba3b45f1995. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9K2489354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae204ac5e707b2151d0e5ee4596bf13be1f50bf0c83969dd0c1aec18c3d3806b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTPX2469427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a15d3fe3e8fb86f7b902f4a5fbcab72f662483c00046c257af4398c5b4305a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9M2339438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f39d02f0cb72927d7d86be6071e74c8630b243ea0913d15609e284af2d1e34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA112309493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a991eecc2fad916d25002ece2d60fdfd9c3115e187b5109e1d7b9df7751cef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2135290.