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 0x3ed134584238e93973dbd9ea12248aa03b8c78e940c55ff8863f31b051a1d4a6. 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/6de7083b-817b-405a-9a6a-62b65853fe1c.json and https://artists.proofprofile.net/proofs/artist/6de7083b-817b-405a-9a6a-62b65853fe1c.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 0xd9dcabb9266fe64a044fc422811be8afbe09e0f7c288191728ad8cc62008b815. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPLR2038719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bab627612f6e9f4fdfdc8f137575ab64282610837ca1b8059586bdbf90e43b. 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/QZPLR2038720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b134de576bcdf0b7d5986db8696e4b6ca4dc2656d63207155904fbd5249d1. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/QZHNC2121054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b29ed9983ed0ae9a465814bc203dd2220d18cb1f5cffc87f8e78e1833c1ee3. 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/QZHNC2121055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0cb741abf1bd9558f8694b275114713d53c55d84f421f580b002b6aab517c6. 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/QZNWR2159159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d11b1ca17529b12bb3ee6fd2c6615454368038e44701c431247687a837ceb8. 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/QZTAY2204247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13bbc0b5d8f82d1098cd1f00c59ddfb75b8dffde6271936fef3c6544894ca11. 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/QZTB32223577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6b28258469680a9e67d86329c93c80fda6e454a46182ee776d993edcf7e5f. 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/QZTB32223578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048d2c49b7da4774d4ed6d008ded5ac9ecbbb198d3fa4041192039a57052cbf7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZTB32223579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7109135c52505ecb54cdcf7394fb1cc7f63ac30b7e48fb5df717a53f000394a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB32223581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07012e28002ba855c8e3f470d212538ad985ed9dc96dcbe490105533108e36. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTB32223582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f189d09b298f1abd6f1b2d9083c859415d3cc328c894ccea809a7417a884274. 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/QZTB32223583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320a76e122aa3b2f7071c215611ddc96bcd9734123c036a56e284352b4cdcd4. 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/QZTB32223585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f6fd02ac995a534eea5daf3fcb2701877f2da5b35a9520acc0f9b4fbc883d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTAX2399123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6a517f83c8446e51f8a7002436d5997a48a5bf824a02cef9107484d963c73a. 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/QZTAX2399124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca843c1ff285f7cc44811c042c98dd6de172e5e7b16ce896c2359634d1f173. 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/QZTAX2399125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070db181617f744306c09f56813065158168804d4f40bd77964341cae7f3fde. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZTAX2399126.