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 0x4fe78225c72958c5adf9d960abedbad0d65413d7265d282be8334f81d46c53fe. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d225d8fc-d1fc-4136-87eb-360e65840962.json and https://artists.proofprofile.net/proofs/artist/d225d8fc-d1fc-4136-87eb-360e65840962.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 0x98c09cde1c08cebf415314649a7b5b4936e968d210156f86c2f38c38536c2a27. 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/BRKMM1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422bbe62cbe647d65799d930df4cc89d0990bdc33691fcbfb9ff19ba41399a9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRKMM1300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa602c675929707e8056015aea209eec094585d3a70d70f55019c4d06751eb6d1. 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/BRKMM1300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2962e3f4d1bdbdae7b94591e4efb7c7c8875db17fd8d02761bdf42138dab67. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRKMM1300039.
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 0x6ed29401319f622dd89c4281473191fa94f7dc1b4e79c8a8275b5ccbb3b088ba. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BRKMM1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9d309fcfc070d496c8e310d99da1074aca94ea434e7d52e3e55f5dc8c7bdb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRKMM1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e1711744d445ce1b2532c36c1079f8d0bd08cdf21576ff7772689088d874a. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRKMM1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2a183f63865b70b2a1f3512ce237d8aa770e02db73a0f31784e98139f669da. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRKMM1300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebe379f5961622599aa925b3f7d12fb2fdd1d1f6be6a11d8621cd7b23dad626. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/BRKMM1300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb22c58eb985ca3d917eb9f36007e9fdfe1c945b30cf9e6cdbb29e4213b66d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRNKN0800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aafd8fef2061d59676ed5e9822e468836be9ae30d55435146a42faaceb31a2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRNKN0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed60fa3c8adb67e1086b076576bc00560584d8e8bc0fe44b1174fa9f7ab82f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRNKN0800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde04c9538aba6f7c720c4363d7ea8296380364ce97063d358996161ba2c4ba21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRNKN0800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b270b19edc257f6ad36b08ad43489ee782838d711bcef7e1eeea74113c3fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRNKN0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8a9a0a8df92b5c16ff48c84dc1a4db14b433182862c927ed2b9b3985b5a7f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRNKN0800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4187ad59d0272008ee763ac2f6dfd561b9584328e8489d296b56cc00a72167. 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/BRNKN0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4459beaf16baad5181b8a7ef1b6d13388d1c451e74f942d25a1f6d0738e3f8a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRNKN0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c7f6c1812477bac8862c58e4e44cec07c802a528eb34b0eeda023247cbb96. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:30Z), 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/BRNKN0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b50c978477774437945ec8f599eff44182fdca75fee1c42548c89788b73b0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRNKN0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89238b410c0f8a87b93f617ec4e8bab10c6c9c3476f7f33809a626cf43dfed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRNKN0800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1b1a33330765df044016c8a52172c2f33f248b8057fdb8e35224be92de7c23. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRNKN0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d9bb741f8d044fdb7b47eae86d71b88261685bda74a4b2923f934f0861833. 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/BRKMM1300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8555c01f6abdc1bbf0a1f5788ebae19ecaa1b4fdba3c26816b48ca2b9c6aaf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRKMM1300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67647f95822e14d1f9cf2605077de2adad913010fc79923862452fa879e32df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRKMM1300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a30f3506a160635b1400e008071956b076eca9e90a0dc72d111af950bb9d36. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRKMM1300050.