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 0xc05ec28e30b89626f3e3528e0599741b9e8dc2fd47efa05108791374d35d24ee. 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/c643a899-1164-4d2f-8a10-ff2967233b48.json and https://artists.proofprofile.net/proofs/artist/c643a899-1164-4d2f-8a10-ff2967233b48.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 0x9b5fca42dc9b954086320d8fb6712ec2f50b20dc8b899646a7f4821935d9cc4b. 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/CA5KR2021004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821826812c5eb1177983ba152391d0229c38600d358b6f2e77625ae5d0c3fcbf. 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/CA5KR2021005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2bd6712325eba76d1942fe39935aa93a78b73531ff33ebd6fe1eb583f824b8. 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/CA5KR2021007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a8272fe7190fa5fdada39dd9da3cf982af42daa79558d7ffaed0564483429a. 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/CA5KR2019731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b435edb5718549230aacde7c66451fe9663820996250e94e61354a379af7663. 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/CA5KR2021012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac47ad5bc42baa992ff7b717e2efd370fe2f6f1ec1b6159db49fdb28bc412aef. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CA5KR2021003.
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 0xec1648c538395fc10eb923c12b4a4fb4e44a3a6d80542cab899d380fe00b57ba. 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/CA5KR2021006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd875eba9ce6d5e9c5a803a46bfe05589f6840e5ac15d621148b8f49b60ffd5. 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/CA5KR2021008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5614ad26bb4f56434ac796667e3d654116510037f3ca10b81c4aeef5a1046c45. 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/CA5KR2021009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3a05d39944bf6ea23378d6ce0c7311a7830d56ad66f8bb59f3c1320845f714. 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/CA5KR2021010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0703d6b33a2213756302e6d615cf2e988cee23932ef4588641d4684284029d. 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/CA5KR2021011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec4b5caa81b387fada067a58f77b582be82d64cd3a36bb346c54b6f27e4ac0. 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/CA5KR2019728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225716c26973e52de21be843fae1ed71a858695b3525b2fb017c04bbc8f39b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNN22179446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35700a83810a4ce8bbdf564c2541b8adf248ffbdd616bf3d3d342f81e7aae406. 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/USUYG1140435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed89f07a76b5b649d3532a1826d6f279d732694c3489fdf308a30c241e044ea4. 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/QM24S2101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfecd1aa033cdef9820e413e5accd381c84f9d741f9242c6040d8c1c6221463a. 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/SE5AJ1800540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48545d50678bd6aa91c17f7cac54e67f9b98670ae261ca92edb2e53a62471c3e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:17:25Z), 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/USUYG1136150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7957bcecabfb3f01fae4359b76183ed90cd00b281d6e65b1e24065f6756f8. 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/USRC11700603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe89d6afa3723ae7970279fb59ee67b788acc8ed192366bb145b562cdde1e7bd. 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/CA5KR2153980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7170f4173828828b640915df36f64d2a6cd4b52c9104e9688e88e9dd6bcc857c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA5KR2260376.