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 0x288459224a90c06650fa7d5b69e4879de963776dce31d058df1c93dfe5d822ce. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82176d59-88dd-4681-894c-078110bca0e6.json and https://artists.proofprofile.net/proofs/artist/82176d59-88dd-4681-894c-078110bca0e6.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 0x0c04318b3beeb8931bb4893828a7fae2b7c0fe38d85cb094bb7accb618b4aeef. 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/USCGJ1960900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6975c24450d63495eed7678089fcd14263a8c31d3bcc2a81cf77cc243af53ed. 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/USCGJ1960905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f13cfbfc4a9d6f68a18ea6943c097419fe770a69118fb9234bc038d1598e8. 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/USCGJ1960906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ef0f3686ab76d8e85004151c9e4c0aca33e6875f0257078e01213b0d206975. 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/USCGJ1960907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8340ae77d49574e82903a3729f2bbf7c20a372e144a32e5e0c673ff786a78e. 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/USCGJ1960908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf9743ef869a91fbc719c8cd3ae283e175575c49b5bc3e8e02f0d4704ceece. 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/USCGJ1960909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780111765e4fdf1af548dc996c890f2846cc7dbb42bf7d87ca72463e74bd3c8a. 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/USCGJ1960910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8502b9d0fd28078e20297ab6e6a0e395d7edc5ed80086806509f36205bd4aef. 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/USCGJ1960911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8ac12b4a72852ef27bc4d54f18030e0f27aac0efe6846a420644cf34ed0408. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGJ1960901.
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 0x1c0ad934db82eba1f731885537650aa49e703c9f34b5b45c9dd14bc1008684d4. 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/USCGJ1960902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbf1f9e7b4683e4bdd8ddfba111102c9b91fd33a053080c58fd6bff7f63e93e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USCGJ1960903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090f6f59844a2f32a4aec533e785d6f40fb68ae33a2a49aa6b02ce4a83202e5. 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/USCGJ1960904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ea1b3b10a84b878ab6ed5fcf4370a33cf7cafbaf81c2b7f9dfdbe665ce3ad5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCGJ1960912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23da7b6e432cc9542a89d8533f25570c0bb3f8b0cffe01a3312e0f1105538bf9. 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/USCGJ1956191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24f6e09af80948d138b71ed196e179bebeb11e3424728b2c1c1db4e8baccf49. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGJ1956192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b581e2e3cbe23f491bc4bfe8704462a28d84ad47eb51bd7aa845751814c590. 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/USCGJ1956194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468217964b272c044e61d34f4c7a9e988760383bce978bbba2b099a6c759360a. 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/USCGJ1956198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa7ac9560fb67424c0a560d3e3ece2a612ad9bbf2f26984672999a178f63e17. 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/USCGJ1956201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf180cbfc020af232db33671b3e9afb698b1ddac100d0409495a73dc9b8755. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:08Z), 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/USCGJ1956193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac4ad8f6cfada3e75e2e79f2b64fafa365f8725618480f1fa60bbb86dfe479f. 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/USCGJ1956195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb10a9ebf48ed3cf2e07d11ba470d401c5d290058f98aa9cd5271265cef8e9. 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/USCGJ1956196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1519ac77d383071d085af97dd5877bd3507ac043a1fbdd1ed1fe4eded8e49c9d. 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/USCGJ1956197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e7bff0a5244345bd58503529b32b5f860ce31db007883b8d7e2441f90d8883. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGJ1956199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a9f0033bba11dee0e7805cec15e701e772c98306dc87bc84085ae608a7af1. 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/USCGJ1956200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efcd7b3876a174fa8ef6d3a779f380b6f953634cc6031d7adfc48214ebc4291. 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/USCGJ1956187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95a97adeae96f6c87a20008463b53a1f0bb9a3f550fad4d22d9bcd8b84cd43. 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/USCGJ1956188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c96e426e32c0408565d75ce34c598765b70347e616d103843bf32c6350b61e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ1956189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc86a6cc7306d29f54f7db1aee8c6421b49eabb699abf44a535e3840adb3ed9. 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/USCGJ1956190.