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 0x202a7ffb242f36e5ca75271dd15098cc9076885385d8ab26284988dac37c58c6. 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/a2535a7d-c8a7-4165-9046-5497713a5219.json and https://artists.proofprofile.net/proofs/artist/a2535a7d-c8a7-4165-9046-5497713a5219.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 0x1abe5d5d0f93a9ad77d817d7c8cfb5717cf2dfbad8a0426cfa1889778288401e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ8LD1948739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc1c82192efa1e1a1877cc3d4642104f68adc3427e5237c8ce747d7afd344b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZ8LD1927891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177f93f90a9b237c66e4c08dcffebcd0f5d7a0a982b612dbccae69a18d7dfec8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRR642201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe9a6c8717dfdc82678dc229579a36870b8eb6d94ec5f319d8c68cb5608bdd2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:15Z), 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/FRR642300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07884fa979e6426e5e240bb6c544c4153c4dd6eee0d72aec830c8d23f869c94. 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/FRR642201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422d2265769981980d7455fc0df22fc0d32b6f581401859f4a3033d849f19e7c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRR642300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615c14ba662c4128191d770e855ac8e39c5c5404aa3a0861f22f2dc56721bd5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRR642201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47a041c30055666c502715716d27a4b0f1db926c3ff545c1259aa46d27abaaf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRR642300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07884fa979e6426e5e240bb6c544c4153c4dd6eee0d72aec830c8d23f869c94. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRR642201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422d2265769981980d7455fc0df22fc0d32b6f581401859f4a3033d849f19e7c. 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/FRR642300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0615c14ba662c4128191d770e855ac8e39c5c5404aa3a0861f22f2dc56721bd5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:14Z), 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/FRR642201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0687f9b7fe4063234f734951002401ce9342eaa5d5d7e636fe27e603252586eb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:23Z), 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/FRR642301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47a041c30055666c502715716d27a4b0f1db926c3ff545c1259aa46d27abaaf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRR642300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3c19a8b46cf8ca9703c842e258559a0c7532c482db7a0fae826e152534b7b3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:19:05Z), 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/FRR642301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4ff98a56317d83f6277b96d9f887b82f6ef444c2b4f7d6996bdebbae14d43f. 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/FRR642401446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79d60912aa21a4d2357a7e3609ef4ad2fc8808158e812f27cf31429b04aaa63. 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/FRR642401447.