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 0x91d3a423394bbee7e04f50cda4a8fdfaeed2c0d6cbb93c3ec91b96cf8c00abc8. 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/eeb1ab94-6ec5-4d6b-a523-3bbbe836d6ad.json and https://artists.proofprofile.net/proofs/artist/eeb1ab94-6ec5-4d6b-a523-3bbbe836d6ad.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 0x29247b3582bf2cc797ac5f0d215abb029d18e9f0d2e5a9db692a0bc258f02a0e. 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/NLE9F1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a8aaa78374ab54eb284817d43c62d73607fff903ac8c404ea5e3f986da179. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLE9F1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fedd59d97312c1ff5b64befc73193570dc1bf599f8971d09954e54fbb931061. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLE9F1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c27ea432b544b29abeb346d6b7ceed7eefed986e8c5f534bb475f7acfcaad7a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:09Z), 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/NLE9F1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9dacecbd28e06887dacbbf793fd52e62e8c600446e0c147a0d3cafdb7e2ce2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLE9F1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dc26aec42c5a12f903cdf3a3e88f3fb615eabff0f359c92f32e8e5177ecf4b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLE9F1500012.
Jouw Spiegelbeeld (feat. Ill Material & Mortier)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5589754dbfcc3955f6e841a2ae0e43bd8648d451fc5340b68e66c762362cfb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLE9F1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c918510f2f6362c3de5d859cdcf6b6606dadf98cec4ddca9a4ea8ff2f770a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/NLE9F1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4b01fc5085d43f57d89e87142dc1cf53d9e6677db1df56955e99041b383528. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLE9F1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadc0438ee9e2b26e52fc42f068dd06865a391aa54ecceee775da1a5e63ac53f. 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/NLE9F1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d434c00c545244f34bfb935c71a56c42fc254773aa3c52fc6afffe024fd35c. 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/NLE9F1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3226119a790b2d087cbd82a4359ecdc97fa9ca5ade46ebe863e7104697b29a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLE9F1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5bf64587c12ff1eb39f79afd3ba93848932271bc27370f7c9261a28bc72390. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:13Z), 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/NLE9F1500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e44f2ed44cf744c13a9a18485ec24f448a4a426b039b31bf676665202fbc6f. 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/NLE9F1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a875be7f4021858d67e65ab3ca0b1d2b85cb70bae41b03d4514646c48da3f1a. 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/NLJ2H1500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae98f6e677dff0144d242fbb586a0c1a7ca1363083184acf570af61d9d99fc2. 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/NLJ2H1500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae98f6e677dff0144d242fbb586a0c1a7ca1363083184acf570af61d9d99fc2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLJ2H1500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c7f86ab12a4b7fb98a007ff41d61b7a1df729260af2dbf44c34905f52ab81f. 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/NLG661801023.