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 0x765056288124ecc7bc12061adf7787afad9a5d34a3f8a92a9d3a0abb8e195ac7. 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/c176cd10-2adb-4d0c-896f-617e90844b44.json and https://artists.proofprofile.net/proofs/artist/c176cd10-2adb-4d0c-896f-617e90844b44.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 0xf5b1643582b914c79f52f5d493e4c955261d4a45e9cd0b0fdea3397bd3258893. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TWCT52212178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d4aea60384261f3342a3370538ac24924690d66511183fc6645cde2e5aa56. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TWA311300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506d23dd9a1ecf575d42233471d3a7e8a5796d9b4010dfa7fe81c9b9bf55e14. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TWCT52212190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44548257b4bfcfa1e12a74cce4ed83a37b5136048631216d3dd1bf93633aead. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:43Z), 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/TWA310501511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299c549e55a1b40423d6f95263bda65ba9ea8634a99f500a322877a9d97f90f. 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/TWAN70660029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516ece326be935bf6f42aeeab049231201e1ef74671a1f49c31fe8a2a812a473. 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/TWAN70660030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c80ebb4115b1349d78c96a1d4a7adf4056bd4f9bf2dbfa8363ddd3a8d2497. 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/TWAN70660032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b99305a3e389da8158aa7540f272d48707d76398659dd877e592854aef5cf1. 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/TWAN70660033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af86cac682387cecca89e04431fee19a57ea4582f9139e68f051c0c73b105f5. 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/TWAN70660036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf553e52d62097006a1be08653809b42b1f61739b29ce51f6e2fc7ac74132f49. 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/TWAN70660037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789d6cd3ef94fbc1bf4ec5e4eb9d04032b48ea68c28d4d985f26a7d46d2062f. 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/TWAN70660038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaff94631a42a334f6e04f61c14c95ab19aea1c4cbae0c82b648148fc537ddd6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWAN70660041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cde0e4c624d128e7c61289d979ac055100a0d4506222cc4d85e3f260d64561c. 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/TWAN70660042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87153d1f46fcb59482d740df3cfb70637f7bbb4d0120d7dd2ef138b6722c255. 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/TWAN70660045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d19bf690a4fe2b5b7d76b5c00a3ea0351b6430e3a6e6d88ffc72bd061b97f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/TWAN70660046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da633c1269a69d9e9070d08e1efb3840dbce352b37fd63fad2525d82a9438bb. 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/TWAN70660049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d952db2f65f717012c9c65bf94d001db22da4a5237fde5079dc4db2d482aa8b. 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/TWAN70660050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c83a873c478feaf434c77cbafa69c49d7103c1008c151760b0e69b06dfc46. 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/TWAN70660052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b2cf79707a47d6545f4034f8c7102e4ed5b00a7f3984726f8325f641d0939. 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/TWAN70660057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7effa18e852e22bbad8b0801b2a30f1b5759409ce04373aade80e32f76a5f615. 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/TWAN70660058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf02cbf7311c94fa07494e31ff02751ad86f163963b9d6182cced35068dce3a. 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/TWAN70660060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37a2dd882dbcfabd5e44d093fc86c7427c0dbad64d6764779e5b6d5b69e959a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TWAN70660031.
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 0x72a8dadf313032eebe2093b1eef480e3e343f3a1a104a9ece01ac6e7d373cfe4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWAN70660035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122f8ebfcd09528731c2abeb5c92e04495441ed2eda51a8525f3828bca8c366. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWAN70660039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f61697f0b16d99af234d9a80714eb3124f22a1263cc16a5bb25d5f3a4c81830. 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/TWAN70660040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d74507b0e6ffcc266cec97bd5826fb89e161d05cbc7fca6b08c3ffd3c811357. 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/TWAN70660043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95250e8c09346a5e3cc545a080cd9b3b1b5742e9d0f81651066e1276ceb66aad. 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/TWAN70660044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed364532a70db395b6fe42c25f69a3f2f243ae7d5337c8d491074d5ddd136d. 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/HKC631506375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5304b76b2d1a50582500560934ae3240e179b55d0491814c32f37057ead372. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HKC631506388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8788b64950968bf2471ce36d89c0a3eeae8ffc1dc564093ad5ba019dc63be297. 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/HKC631506391.