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 0x71a4812a2636c91e4a51cf54579ac6a76399f359ccc514c955b128e71e8b0173. 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/b951871b-4c73-41ec-a8b0-26400f64bba4.json and https://artists.proofprofile.net/proofs/artist/b951871b-4c73-41ec-a8b0-26400f64bba4.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 0xcafe20ec13f4abc91be7b825b7eba9d30ffd90f1462e44fdf675423748dde766. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HKG731790677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca823fc751fe9c9050d9688d0b1687bb8e8ee4fa3b79120b21794eb2c8bfeed. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:45:57Z), 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/HKG732260155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96142bdc7e16599a6f603dca297b87373f6134b53e9869f3fc3663e1ee1599b6. 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/HKG732260156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac56cfb0bf821a40479f98865d3c425507840599429c1373f2c3592675cc2cd2. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/HKG732257098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52665824812423ad61efb1f94438d630c2574c78c3790a8694898bb046dc2ff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HKG732257103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1821efc18210e9e79bfc1a0ad74ad83ff805acaaed312d688fcc54c68a30542. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKG732257107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ebedc8ab0945a2d7fc66e897b85eb7d6bff0af9e71d9323f5db43ac467421. 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/HKG732257351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72109f9aa8ae77fc77d63e86b5d333ffc5eaa3f5ef15fd49f8470e9d04807cac. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:27Z), 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/HKG732257943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f59fd09d92d44c5e96f60479123205365e435180e559cbf2a8946c2fa9620c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HKG732257945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b307af2f5c4283afb540377715f3f7678aa6016746303bb05b7ca4166f91251. 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/HKG732257058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f89a30b9824523b23f053d3d81315e671035d9b3ede23c66a2b7123523c745. 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/HKG732257060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cca5a75cb0a669427bd257452f3f6905db573cfbb3d93cac1f438c5bbdb9a0. 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/HKG732257066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eadd955d40fa90291f1154131df89b89a7ac747f7cf263d880a001b6879d87. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/HKG732257068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9557c60cb1abe614613b24117779dd29b11dce26f1d6771d97804e79214ca6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:56Z), 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/HKG731604421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d42ecad95390759883a82744ea0ddc4bd9a7eb495aecda5ee177df8e5beae. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKG731604422.