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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a96384f3555adab4ddde06c096a175bfdeff721934ccca2b40b9289d46136. 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/de7a14ee-92dd-4c7f-8415-a3075e6b81b8.json and https://artists.proofprofile.net/proofs/artist/de7a14ee-92dd-4c7f-8415-a3075e6b81b8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c8b3087121bf7b0b9e1e23a6cc8986f13bae1e54e8abd5d129a78b06829810. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZ4MQ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062e7896f3bb227b80ddf34825548088dec11c36b92b1a5b3bb9b3a5a12a53b9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZ4MQ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60b099f87e74ee6f35eaa60b13ad10b162deff895cbdd1a8b4df8aa45a5509. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ4MQ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a39221fbb95ca83942d0e8ac47ed275b7f0ac709d0fe26bd0762effc30392. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ4MQ2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac30bdae14bebde846222ecf99ea2533390beabc879c200607c7cd32a8cc36. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIA2426754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1319834b1846474ec978b31761b2138f80db1f465b9be53282f305dbffddc2e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJB2483154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caad8efd2581e8d1e86aa0f7febd9c4ff23630c24cf8121201e9f4ad102282c. 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/TCAJG2549082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355d524e933d761ee95ebb2e2d32aa4b0f89a70b26ec04dc795dd1ff62f59fa. 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/TCAJG2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac30bdae14bebde846222ecf99ea2533390beabc879c200607c7cd32a8cc36. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIA2426754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4efb3f85d9efbce2d83feda12001a58856b3e64c6610ddc27f05e98faf5690. 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/TCAJG2542792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd534468184d289dc2d9b2236da520d96a805ed28a2dadc03937ce39f901b9c4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIJ2422986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1319834b1846474ec978b31761b2138f80db1f465b9be53282f305dbffddc2e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJB2483154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a6bae69c555e75fb284d0178a04c99af5a872e7b644b94976aec0786c2755. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAJG2548938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1a23d2bbafd855fa89f66b4e7c70ca24c01f363cb4711f4dc7d6120e4ebf95. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJG2548965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6304e720848b28631fd5ab039e480f9ac756d9f6ca0cbd24b479cf9e701bd5a0. 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/TCAJG2549017.