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 0x011304b135a7031b4fbaad584e35d8925d6a18875fbd01d5bf8de29e0b2b1823. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1236791b-ffd8-4723-a619-4618862426ac.json and https://artists.proofprofile.net/proofs/artist/1236791b-ffd8-4723-a619-4618862426ac.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 0x885c8b397c6b38e89a5fd1a07374b9fa2f8e352e2410971be7e92ce99574e98b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA601901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b41622bf857264e3a1bbe983e73d054c9e794d02ebfe2c57647d06b3380eec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDA601901448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9bea654ed588266b5059681c14aa5fe18bf97cbc006eecb882b7f847f63b54. 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/IDA601901479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc165186cec630a052f0ffb0a6cc7628321569a9cfc18354ec5e71ce48537e6b6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/IDA601901508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e79c55d5026fef7b859ceb38c98f3997a048126f4abb0028e2bd4314337f8d. 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/IDA601901590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f8daa5dda4b0dfc323ab123790d0e114bd39fa501c4b356d17553f7543e06e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/IDA601901619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e92b40a266ebd867aa70183dbb42ba810ed1aa5a191703d21a09ab69094fe90. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IDA601901650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c245f273dc8784e7502c77d05fe43a99bdc74aba0205a2161d0fe59dd10f1. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/IDA601901857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee9d2a094429616c92375d5b487a3f0b68262db1af290b7c5544c7cf6e854ce. 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/IDA601901978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59150407edcd2551db177158309fa28acb169f82a1114ecd1109bca0e1822604. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/IDA601902142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300ebfe9d4d6a0ea533a1543d14ed5ba682a061c43afa65e426a7c2f66e50e35. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/IDA601902597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8846f38c3e854ce66527d1362fb3116af8acaad85e0bc18ceeb047ffa4b592. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IDA601902646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b338c3b84ceaad0120bca1259be54015a9ed5b2c4012a28133e1bb98551dd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IDA602300012.