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 0x37e22ed08731445ff1de1a7f8ecaffadb7872189e2bfc918b9ebbec1f1f9500a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f203081f-da87-42db-8d3b-5a8b59169cfc.json and https://artists.proofprofile.net/proofs/artist/f203081f-da87-42db-8d3b-5a8b59169cfc.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 0xb60e824098d7e4ab7d3eaf670c6ac2b0c2a159b7d043a3321b74f3d0102083a5. 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/USA2Z2400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1027329fe15bca9c7ffdd614ce7dfc220461e2b840065790400110bf123f57e5. 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/USA2Z2400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0178deaa64658b5188cd404541d4704030279549cbb8999344f61a81d8dd49a. 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/USA2Z2400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f90f7459e20f735a645634c558b6ef884e9eba04741269c902c27b57c557564. 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/USA2Z2400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48485217a54e48bf4d5f806d5fd91d5476fb59593bba39e5d356b25fe259db6. 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/USA2Z2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99816c7059d5e6dab0d82e435579fbfc323330b90c97710d227bfd8166638ff. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/USA2Z2400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d2ee2d694fa3f000f029a8836145116eac4b737af4ee3d37bd67d892a6e373. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USA2Z2400514.
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 0xdd8fa52261caa56f8be464f7a0101a6154274b0c4772682ac1b83ca591b84ff2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USA2Z2400517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e071adfb23b70407e77bdfe358c3a29631d9ca4c60680c6c715248019a550. 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/USELN2319401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba9d97957ea12ba6c0861b8fe43b57ba0a77cfc13146a5ffb32d57c23d5e311. 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/USELN2319403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b3ac01db05be06fefbc74fa0af2b14cf775f648d433ba1880cc496682ab915. 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/USELN2319405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84401e9cd17f9fd57f2c543b0fbc1acb406dcc31feb0545020f33cfc75cedae. 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/USELN2319406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b2a725653833a4f27e6df3df5debc46eadbd7aaa170b82cd29ce182c4b1d7. 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/USELN2319408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694dacf90ad52a87d0ae739d21e7b9c557251fb87968540169e0d61af9750001. 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/USELN2319410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee16494cec2075b3148d591ff11a1198c23e686c620f0fc2fcb2e6eee131435. 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/USELN2319412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a63f7d182786bd61d9af5d20d6a1e096dcd03c1cafb471e82468616c15efe3. 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/USELN2319414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30687413bf616f0e4b3e368df56adcc595a11151bc9578272fe44dff2f2445cd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USELN2319402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ff228645245da3818aa2c058fd6b9283139e12b6abd0295630ad1ac5440ad2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USELN2319404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3106f3ad21113eae751ff2b4c33aa76ad89f7657a78eb90a89cb13ce3da37c94. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USELN2319407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa455e7152cfe79b67204d5737bf1e2c23d04e4e535708f0d606c94a958f12b9f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USELN2319413.