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 0xcbf8c3ed6e514e9c715fe47bff91c6aee28e00cb7e4392dfedb7bd1cd71c71f8. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f2430a6-9d67-4703-8954-5ddfb8929732.json and https://artists.proofprofile.net/proofs/artist/0f2430a6-9d67-4703-8954-5ddfb8929732.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 0x5e90ba6f08fe2b0992fe4ba80c8b41a3ee4f3496cf43c57d45c4a3f250a31167. 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/USL4R2148896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d583a7b7f99e0e9fb36e024009414d94bef6ce5a33e741a0189ae1760d5ff7. 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/USL4R2148897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d47dd8cb11cffaf8d2f85e9d42d83e35fe5c41b4dd7b778f67640005b843c7. 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/USL4R2148898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c249b53ec62bc023762f2e6ec9280bf1402a01bded914f0e1ccf57275c9819d. 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/USL4R2148908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984cc2d67432e851c84da2e7e91e7e746c1470da2715cecf2332fe5dbcf2b5c3. 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/USL4R2148911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8157955a2780c89551b1a457f67672ae1fc2844308f35e470a0ff3c671a040fb. 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/ARZ021900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c7b23aa4ebce192eab4b9c372078ecb12134f6ea394d1ccf605ba2b59a1f6a. 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/ARZ021900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e294846c64195a071df7b298e1e69280870418067f7b6444ae539b1d51ae09. 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/ARHLR2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d5da16a0a4097b1c7078a3a57e6efa1593854e03fe5d7c208d81b7114e15a. 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/ARZ021900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27368df729b2c92bf93ad6889a96fceafe490270904c7beaab3364655c6e5c2. 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/ARZ021900183.
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 0xe5e11839654d30844af07e345b345a16ae17e72c1bc6f56d05e5070b942a0f69. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ARZ021900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252dd0c13e66df2cb4dcb7ba3cf8dec427bdfb5226e12e601984c176ab8d8364. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ARZ021900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef2b33eab8d673c738da630c3edc2452019dce973a4812c0bf727640647e479. 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/ARZ021600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb672572930342a49bd39bfea5322a74ecce03edef6d7b75cfa7a82c347ed03e9. 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/ARZ021600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986e305b790026a67cd10c3413c2809cb51c6e902518f0cc7c22d891a6a092e. 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/ARZ021600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa3f47429df1360d3732fa42b98cde225cb0fe59b645a241db05c9e529df3d9. 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/ARZ021600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7d5442560241f63a31f67509b5f26b41b24b3cd41368948292ad92dc0bd4f5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARZ021600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189960e1ec27b3325fb3c82426976eb5481de4044a86e234d4bc11b9dd3eeb5. 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/ARZ021600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81165078e8a973eb0cb740449d1353bc0368c6f81d382f64381c6758ded9888b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARZ021600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ef2f0b045547d6b54f103267e88e4d0fd9c158fe107e9b59a209d06abbcfde. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ARZ021600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac1b9489586f94a86f9eea112d802067545d3932ad66d79588f834649ec8a5a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARZ021600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54927ca3661af3cb38463eef33458241b43a2d98488ca98cae8f3a661c59b7b2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ARZ021600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975f31d55d259fcc0c37253ee99ef2963b4458dd8cf1be754a3daf77103d407. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ARZ021600213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84b94a16a9cb3187e1f717f630e9b908bfa3cc85494fd00d4723a35da21101d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ARZ021600215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc2468475696e4b965e30449245a8b1030447c26c70401fd27e83b932762b4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ARZ021600216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430211a5323ec1cab21d1a87c3f23f47b2fadd4691ca6160be44cc172d75aa0. 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/ARHLR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9f0c144e6f29e0943b219a8598ec40f93ba0dcdfbc08693939cecfe61633d0. 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/ARZ022200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7c12acd8ab9f3b751b37dde4ad70ced973f217e12ad6022fd5e1797573b591. 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/ARHLR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a673afe69d472f3d5f3bbde4fed57122f69a40815722c9873e194ebb584c49. 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/ARHLR2200001.