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 0x5e4abe0c07f05b2c0467a85c4bcd5f96f68b63a7c2d79ea5cd1cfa3a379ab886. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb1cfd4b-8062-4787-a1a2-15becddd57ca.json and https://artists.proofprofile.net/proofs/artist/fb1cfd4b-8062-4787-a1a2-15becddd57ca.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 0x1538a075d626445c147c80bff150302ee0821fa0fb2dea2c12d6d46526bb174f. 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/QM7282371712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f342ab679a42e56a0c57e305b47e2eec80b916a8f0a988ede3e6d87959d308. 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/QM7282371713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010dafe8b1c26ea9a85f19383edf7079d7427cdd8109fbd4fa2f77ab38f4b1e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282371714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5e307749f1bca13f6a7805bbc2b4375aa24bc19e1e73feeb11cb262e30e1c. 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/QM7282371715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3669af2424088203e33504629f661a08582cfb0704561372b1c59ee74a46ee4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282371716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4342619d9bd7f9af60a1bae8adf0c53ac3b07c3547c33ec5ae4817abece27769. 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/QM7282371717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4dc37ba430471280e3d2a0c231ece5fa50f935e55f9b3298510bf5f6416832. 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/QM7282371718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb474a7ce739bd527df1b459b2c1da0ae0d2a2d1faedccef4f80a5b2a5c525. 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/QM7282371719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077b503b76cb748e70dddf36b68e945e0fd7fbe5316315463a90a666c5bb37ee. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282371720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc130c53f08ad09d045f6fc3900d99a1a6a07fc319c551f277b25b2bbf5bf624d. 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/QM7282371721.
Verdens Bedste Dig (reprise) / Det Store Kommunenummer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad9e6aa4ccbebad36e05ac71b130c2b9e0731dfe44c65cd0d2301c0b38ee64d. 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/QM7282371722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b7f4050457e8b0b2b3f3c00b3c4c755e7f96e845b6871e15000db1c6c46e76. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282371723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6727db9e4774f902f759e42b9f1d92461cc630b3eca9da81445d95105c901e5. 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/QM7282371724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ed1a1ebf0b174e50da22e3ada7027d4c83db5c81b8b9fedc96793b6203aee7. 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/QMFME2039511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668fae372fb09dd856f144a7306fdf69929cebece33f571377ae19e043ff4ac0. 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/QMFME2039504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ed1a1ebf0b174e50da22e3ada7027d4c83db5c81b8b9fedc96793b6203aee7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFME2039511.