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 0xaaf9866919a0419296f8e31cbcadb6f216f116ef522fd520b3d0e0f73385320e. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48826070-fc84-47c2-886e-5c9d20910dd2.json and https://artists.proofprofile.net/proofs/artist/48826070-fc84-47c2-886e-5c9d20910dd2.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 0x1a8867d228c8d95b0d2ae0c91352415056c6c1f5417e135d4f97357aa2326926. 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/QZDA52106939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412aef55eb09fd1254e6552b6a7e9f9795aa2c3af3bbf51ec5bb700ef2aad635. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZDA52106936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d1f7d831f3465467edb11f03179aec1ae87a549248bab5b968ed497083d6e7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM4TX2260988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb982beee35e77a2a0fbb70e62fa29ea5946e756e4ff8eb8ac1fe3d935a820. 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/QM4TX2260968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5365f96f676de0b2c0cd36bf60e1e2f2803594be8c5cb5d1155f12b6d05512. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TX2261000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346ecfa6f3f5e064a2e691d9d698bb88c626f3cdd1d2910bc4d5192462f0327. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FRX282192838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445a9ca7a373f46f1e400e92dd2209b327d3eaec359e27159054fc015440a76. 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/FRS182161792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a01031bb6bcf639c6f2467854bc14022af47ed3ded1d039b30b97ffe1211d. 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/FR96X2130622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b8c9c2e9feb6bf664f0befbf87f7bea5d67a5e9e80d095aee2935016789480. 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/FR96X2130624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18994e886dbfc9f3be5e45d37d16f88dd60c8b47f3a536cd0333d69ebe1665c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR10S2193906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8fc036e5a1915771dcca72423f42ec0ca062a7e58baf9c5edf1d307967473. 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/FR10S2193907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8f4a6ef6db154ae203cbe867f01250365b6c330ab2f4b66f0613b132fe6afa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR10S2193911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e38144ee7caf759231985a8c68c1897e6181fb33062e6c393d74095f2a371e. 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/CH6541675486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34e39a458d1dab1316e4c9de42ae750fbcebc772d66881ea8304af1f5642429. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR10S2193912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f182b1d7074b0dd96394708772a3bf71f011979c2b38068d6691139c52e881b. 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/TCAFG2049871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe516e58b9b6994ecd939306e568b209386569c1a470cba1497a7886de86aa. 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/TCAFG2049899.