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 0x778fc61f5efbce6897395ebef38b8e9e2c3780de8af76b5d8eee9e3ab208682b. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ac710d1-d49a-4c47-a25d-0f34efb9f023.json and https://artists.proofprofile.net/proofs/artist/7ac710d1-d49a-4c47-a25d-0f34efb9f023.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 0x3e9ab40597557c13cc0044bcff1a60baeaaac78c7552b721df8600c93a4056f9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/US4R30515290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084e9c5b91403e15ce29620a5bd8ff1555f4fba77a5e08b4790bd00b70baeb5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/US4R30515291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76837389ac845a9a799d0497eebc1cf7fbd5c9c62053a41e0346175d28ef93. 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/US4R30515293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d938354a40a687e7e17701f3afa92062fd8392f0ae03fd4d0e3baa273c1d245. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N21893984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8361898e7b19af99e88b85d8b24506ca8590fba8fb819f9455d1b837d25d96. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QM6N21893985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736bb779666e7b442efb992fde6bc012259df1169d98fe83fbac7721ea5b865f. 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/QM6N21893987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c24c1c9ece9464f4df6ccfb2698a0a2f837f6f382f31be719a3b349d56da27. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21893991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269823bc948fba0dd683b704b43a6a7c1c242ebd7321526bac1fe9b135b86930. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM6N21893986.
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 0x3c370ae5c37520a74700935ffc008b555157c47145749e2e77801189ad669c08. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QM6N21893988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22451faad151253ea0162529ef0b1ebd95d809abbbbbb0d80934cb68dbea7012. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM6N21893989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b310b8789ead6beccf06e4a0a2d139ac7518d9554f2fcc124367086e6ed3d53. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM6N21893990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1086a258310101fc2c2f9e75720066f7a110fc985537030ddf8a1e9b7c2493. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1946821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a195465333b116835b7e51d000883aa98e29125f37333196f25f3ef28d4404. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1946823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104284d0297d45e6798a09eae3d29fa537bccbac4459bc46e030d13afbcf05a5. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMFME1946824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e92203d035a50ce2232ff67a7fdcb2c32e46418c258ba5dc9014cd9b33f494. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMFME1946822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173961cd05a56df283ff8638b372be521468898f111a322b75423ee9f4cf9f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMFME1946825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043e20cba0456bdd9d86d9426e247c1b523f794f318510458c14989c57b9fba4. 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/QMFME1946826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce47809af0e4211b18d71d31e4a1ffb4c859dd43446db3c37b53aa1560311d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMFME1946827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab64ebcc2dba0be9650f3d1c3f380b070e531deb86f9a34edc8ee87cd7abd79e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMFME1946828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f277b40a268142bb20355a5b251afdf846aac423bc1dbb84a050f593d5075. 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/QMFME1946829.