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 0x8843691945f8b4b529fb5859517f044ae3082ee1f9f096d29d02a0c3aaf23808. 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/eb713a8a-7e9d-4483-a372-3b4c301de618.json and https://artists.proofprofile.net/proofs/artist/eb713a8a-7e9d-4483-a372-3b4c301de618.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 0xeb6622a87db0d1a6acd0275119ea3abfd78bee0d4ed10d3cf0d78c3d54e37454. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:56Z), 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/BXHM32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26db21b61430c19ef8bd9a2cf46f2f0cff69c1b4d0d87600d1aa99f8ae407ff. 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/BXHM32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6622a87db0d1a6acd0275119ea3abfd78bee0d4ed10d3cf0d78c3d54e37454. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/BXHM32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956321b2e3b2b9f3c5443c7c9390c6fa97ed18c627a503d755b8e5b1972d92d. 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/BXHM32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26db21b61430c19ef8bd9a2cf46f2f0cff69c1b4d0d87600d1aa99f8ae407ff. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BXHM32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae30a28eb5845d75c599601c7574427a3e4153649a476e280ff62d911010fe86. 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/BXHM32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6622a87db0d1a6acd0275119ea3abfd78bee0d4ed10d3cf0d78c3d54e37454. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:54Z), 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/BXHM32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956321b2e3b2b9f3c5443c7c9390c6fa97ed18c627a503d755b8e5b1972d92d. 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/BXHM32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26db21b61430c19ef8bd9a2cf46f2f0cff69c1b4d0d87600d1aa99f8ae407ff. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:17Z), 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/BXHM32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aada3ca7336445f169e7aa6584a99e993c29afaa7350a0e23a137d29bf021b2. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/BXHM32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae30a28eb5845d75c599601c7574427a3e4153649a476e280ff62d911010fe86. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BXHM32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6622a87db0d1a6acd0275119ea3abfd78bee0d4ed10d3cf0d78c3d54e37454. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BXHM32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956321b2e3b2b9f3c5443c7c9390c6fa97ed18c627a503d755b8e5b1972d92d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BXHM32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26db21b61430c19ef8bd9a2cf46f2f0cff69c1b4d0d87600d1aa99f8ae407ff. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:50:43Z), 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/BXHM32300005.