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 0xb44dbd0f72096ae71d0a0c37c609bfc7cb5b77c4228284fc83853827f224c22b. 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/a3c64223-0fea-4034-a51e-5c40a944f34b.json and https://artists.proofprofile.net/proofs/artist/a3c64223-0fea-4034-a51e-5c40a944f34b.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 0xc798440d17b0b740d595a8adf763b449f3c5575b0e5015484f561e99ce1c79dd. 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/CA5KR2282643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55954b4d6f090bc6692df64db82615de7b1bdd0c0b716a55d2544892cf8db9c4. 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/CA5KR2294803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798440d17b0b740d595a8adf763b449f3c5575b0e5015484f561e99ce1c79dd. 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/CA5KR2282643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af28bbb6005a34fd6602066eb291c48c6aae88c2880b42b74244bf5395e080f. 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/CA5KR2303747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55954b4d6f090bc6692df64db82615de7b1bdd0c0b716a55d2544892cf8db9c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2294803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798440d17b0b740d595a8adf763b449f3c5575b0e5015484f561e99ce1c79dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2282643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ddb4db2122517fd3c98e69e5be2f48872c21f1f197a35322bd010c0b2c86ae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:17Z), 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/CA5KR2311637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af28bbb6005a34fd6602066eb291c48c6aae88c2880b42b74244bf5395e080f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2303747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55954b4d6f090bc6692df64db82615de7b1bdd0c0b716a55d2544892cf8db9c4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2294803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44956e330214b8ca7744ad5b85d0a9f9051b87a642b8e1dd957f7ae2b558d68. 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/CA5KR2315737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8438854837e7d5f0f5a3846aad64d04c4f78152d3a1431feccb638fb0bef061. 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/CA5KR2315738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fe4fce22a4f904f99f69a09287a2092ec7bfaf38073fe1a7452ee32dda7dd6. 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/CA5KR2315739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc798440d17b0b740d595a8adf763b449f3c5575b0e5015484f561e99ce1c79dd. 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/CA5KR2282643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ddb4db2122517fd3c98e69e5be2f48872c21f1f197a35322bd010c0b2c86ae. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CA5KR2311637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55954b4d6f090bc6692df64db82615de7b1bdd0c0b716a55d2544892cf8db9c4. 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/CA5KR2294803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af28bbb6005a34fd6602066eb291c48c6aae88c2880b42b74244bf5395e080f. 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/CA5KR2303747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80542b7d2d1725648c46c7784781a99e004721274c38fc7a68606090ba81df7e. 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/CA5KR2315740.