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 0x6ee22aefee1d10e572bce23def4782770528270ff7685e56ae9f0d5e5a0b18c6. 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/01300529-ebbe-49bd-93b8-c67e9499e690.json and https://artists.proofprofile.net/proofs/artist/01300529-ebbe-49bd-93b8-c67e9499e690.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 0xb3ddf80c5d2c06a08b6860d5e99ff4800ad047c6438bd0a8e648d97df9f341dc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BEK011800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73191d16ce66ddea94d785d66de861d9aae080c32c14eb038db6ab4d314a2cd7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BEK011900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e62f27b871a41f3a317941664ee9c9b3dcaa686ef8b549e1641a92670c2ee5. 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/BE3JJ2000001.
Bos Voor Iedereen (Campaign Song Natuurpunt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8d3fea2514cc0c148035de9c712a2390ac1825662c268fa22bf598449a69a. 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/BE3JJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a06ad461ac817e4225e60bd9e9596f892655acfebe2d9ba006197413f0299. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BE3JJ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2d37be2a6ff9c359d7e8eee11e14cdcba63f5ba43d37e1eb2605f2795863a9. 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/BE3JJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2d37be2a6ff9c359d7e8eee11e14cdcba63f5ba43d37e1eb2605f2795863a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BE3JJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8d3fea2514cc0c148035de9c712a2390ac1825662c268fa22bf598449a69a. 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/BE3JJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd67027a1fb85f2322a3e082a6289b006ee1f2e7cd499857b27098431caee16. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BE3JJ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a06ad461ac817e4225e60bd9e9596f892655acfebe2d9ba006197413f0299. 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/BE3JJ2300008.