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 0x346deb3ebfc875c675f6af5f357419065f7b81b94da213beea7329c6547691bf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de508e97-443b-4499-a569-e0b79af87220.json and https://artists.proofprofile.net/proofs/artist/de508e97-443b-4499-a569-e0b79af87220.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 0x8b50ce1da61258fd61277104d3ec78c023c982c25fa9f10e23010d10c18c45e9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBJX32261313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258371289c926b2721ee294721d1098af1e827aeecfea06ebaf4eed8114699e8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLF712300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01cfaa2334a4ac5bcc305067cb6d1a3e0c4441df7c7401c8e99aa26dd33b359. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US83Z2504650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed73fe12f4306199dd437b2d06b858dcf962122a0e30c23cd72c3480e7a75900. 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/US83Z2504651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7fbe16d65aa9bcf1e941dbb687d3b5128ab9fe00ce23cda210788bd045f6e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2509056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703b212c0c456af7d821206037ab5d9628e22a9e71ed9bb7eed217892da0d6f7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:03Z), 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/US83Z2533859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e9976d8811cfcddbbf0e476f3f927807f37aee7bb4da9e0ecc874abcf25599. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/US83Z2548005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc145858bdfcccfff9c36186eab84dbfa83d8b66a0dd2d113c75abb5fed83b6a. 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/GBKQU2589913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1df5bdf777fd982935638713bef826ad5d476e7feeafd8c8668bff03f0acaf. 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/NLF712309083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff47c7d387bc62c941d21af47651daf0cada8030c0a55098b1b26496a11e670. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLF712309085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae7064f921aea4ceed78e4bea26e9ec6f6b35ae03b45d014c26791a474477b. 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/US83Z2133522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57112766c5e99184b08946fa6efab6ed624a4370791897943ae1855fdcd0c8f0. 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/NLF712409912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aedb3b35b9f33b7f4537da1319650233accdfb82a11394b8e1248c5d9762e6e. 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/NLF712409915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bae27c856522bbe6fd19539cf0174b41cf6491fcdd3e9ea3528c1cd0f954d1. 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/NLF712408837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a6e56000c84e0c7d650df91423ce230f7707aba2249be61db0359c43115c37. 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/NLF712408835.