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 0x71ef4e838c887488581789805db5b2993cf9f527994652f76c1b0d23109e8a6a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfbc8057-3657-4568-a4f5-0379efcbf746.json and https://artists.proofprofile.net/proofs/artist/cfbc8057-3657-4568-a4f5-0379efcbf746.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 0x6a84ed2870c1833508762c0f00c456cb4a7af8feedcbf244b9c95c8ef706f0b6. 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/BEX501950202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0498e71ba3a3af13b55ed7e308cf4d26025cd9fd734324cbceb6c5244ce1a6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BEX501950203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe853d50c1fa784ee476fa3b1035b64606d1da987318afd2ee994055a4f36add8. 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/BEX501950204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e14cb24a29a0229ec9cf2a981816b20a927ac99b273ab1eca520ff5bda216. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BEX501950205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcfbe578d9bb8c3944df67a00d3a8d875f10f5752d89aba7ed30ee33bf6d39d. 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/BEX501950206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4aba28fd41b46afb47ca2892b8b71e2a80b02086f2707b2c3b4cd0234f9776. 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/BEX501950207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483080890a1ccb6056e05aaf2e445fad50134b2ee5c31bc55332675ee69be02f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BEX501950210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ffa0feb6edcb83861306346de75dde64c43a813882926d679fb6d80e0a4dcc. 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/BEX501950211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d84541ccca24f09a565f8b5afa77ec20320edebff95127799f912a7782b678. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BEX501950215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63491c8c33ccc2684ea54db7a22c1d4230e393c3009793c64960bba9572805cf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BEX501950101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2f8fe012dcba6c2275ec7ce3b6505e48fddbf76054c98a168a95bd85e6d747. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BEHV41800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb98f2e9ee852b408b9e566a03bef80cca98d287301fb313b21a220d9d6bb415. 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/BEHV41800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4f1ada96dc58fe9146b8fa37b792bb822dc88df0d3b59626361df5b35d6eec. 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/BEHV41800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a040ecd7ca0b58794397182988c8fae9700d897483b72d925348e603a4a69b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BEHV41800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2638a7ae0127984bcb54c467f4e68d6e17bf9969e761386c54242ecc701bdbbf. 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/BEHV41800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293ee4cbddbff5203584d0de541413d2ae7cad205c17aba4932062b244dac2c5. 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/BEHV41800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881d1698bac38038c1f386345e78079254aea6b52ac0d04b26213cd15d68ac7f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BEHV41800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e66f5e195438809515c66d00aa01380f7ea673a0a236df8bc82277eb135dc31. 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/BEHV41800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee12ce48887298ba9a921fdc28db0b3fc32fb3280455d504d180c61aeca95a5. 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/BEHV41800013.