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 0xad61b31051b7ac80a922c124a396727ecec92974130ae4ee74bab6eb51375301. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73651982-2b1f-42d6-b8e5-38bbc62e304c.json and https://artists.proofprofile.net/proofs/artist/73651982-2b1f-42d6-b8e5-38bbc62e304c.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 0xd1f65df8c335b4c27eccd5790da7db60928340e37e6d0e05548586550c155756. 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/ZAC011200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3cbcb22e4a89380d1b866ddc28333f94c98062eb56387d8114a8eaa2bd7c06. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAC011200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d071c6053e9d84ccad7f8f1e2740a4dea41b6f9487ea035762e6737cbb22e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:50:05Z), 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/ZAC011300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5923bd976a4f378f9eb2c6ab1e10c25cd95d739a078a30125e5908bedf5bca. 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/ZAC011300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376239b728f6828000df14b67f254e8f896da82dd805de63714a0603a5cf2402. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ZAC011302892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa49bb0297b01d0d37fe1ea8d9b2aa132afe8bbbc72f85ff75d72a064782d90. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZAC011302894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f9cf5ba8ed67f350dbf58e4ba4cd759ca761f2360f587b6447750ee52b8cef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZAC011302901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea159da243c94d4aefd7ac2c5496bc308ea162a811c0950e6a206cf237965733. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAC011600749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db89216227d5218ab7513c8fd5d9642343433cd14d6279dcdfa770eca5e258f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ZAC011600834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17a006ece70a0ba4d716034c4873572523b9cbf2f2eb89c5f52f23be0567098. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAC011600833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd7f762faa29c00b9c86fd49555a1ea55273c9e61f5e24d75b3ded0b204d599. 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/ZAC011600837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374d4483a35ac60626e90271a81e8eb28cd9299620e0f83c707ca84ae63c7e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAC011600838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af04090b356804c1470f5b50b91138432f03562e0404e6530812aa16b4f9cf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZAC012000070.