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 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 0x864e8b743e9c29a25a73f242d0e43006ed22dc7cfa68b871f0c2c994cb0beab1. 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/9cc131b9-ea3e-49e7-a4a4-1dae894f7290.json and https://artists.proofprofile.net/proofs/artist/9cc131b9-ea3e-49e7-a4a4-1dae894f7290.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 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 0xff1795e7aed5759d7cfc0cabdbb303c7b967dacd6c872292663b28557256c94c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZ22B1823755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d09c8791ce2b8205f2214a9e299603abcb7090a47d5b587e75251750ee9b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ22B1845525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362efe5ad81bfaffaca20af49f2fae2f8cbc28afc4d04820565d77176d5a9ca5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ22B1931178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8239e7f64b967a585ee9e45163537811e36b09dfbb240f70acfdaff6eb8c1ca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ22B1982672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b14edf99aa015425412bad4663ac718cdc134586a8b8d12cc68f5f2a3390742. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ22B1993232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897ad582b1d4ae50e1e5c1b4490ecc49401bcfdb484cb6835fa4d01b39a8d73c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ22B2018530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0376052d50595f4af827e67c20e8b7e525264e7a58be8dcaf77f7b1f7ecb6d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGWW1943134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36de9230ebeca1818dc3b588f1ec92a77c811bd6fcf2ebc1c1ce3cba29dc18f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZGWW1943135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7d54576d9fa77a79fae37e8330d43c3843f649cc3295ee5ae8ac15c9afa8b6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZGWW1943136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4870590d5f24814f2b96b7aa5fe7a3857a6d346cb493fa354784b1b5ed5ebbf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZGWW1943137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf75c3e63c4a93eb83e1dd06fe276cde5451a260c598be35f47399acc8dd0c1f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ22B2089674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1dc4aac897f072233af4e4f9b7c54414daa9e0fe4c96251cf0bf4438551bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGWW1943138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27238d298c983e1001cf9105608bee23ed8babb348efa5e6eece168e6cf85cec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGWW1943139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e299db9d80d0d00aa29ed10d1a20362c4e175c16927c59490b68c734af7118. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGWW1943140.
Blood Rushing Like Current Through a Powerline
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71338215224adae222e08dd150cf311f66a08d1c3a6aefc0ce49e5e332fb7052. 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/QZFZ22174338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66dbccc987d7a7017b64778e1482c53853ce4b85a01e97d386185df4a5d0f9a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ22174340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373a168ebd9d8d6b440f1e4f6c35587c7b05bb8b7cc65d6b0cc4bcde57213d00. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZK6P2217841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714fcc228c4b2b55d5b57e9828e55b364d62b85b86318d5406182c41e08f37ef. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6P2217843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd585a19cde11fa58458deabf67ed90e4bcd52a456f83a8ad25a10ddc44f43bf7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZMEM2293900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4655d55f3998f860c4b383c652989fc1311ad412fa2cbb16aac2d7189a310c07. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWR2218677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cc2021388e46bc87125ba5c028c23c03260b36e4b62bf0a6ed93e7f83f8f6e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2390723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447441abe29f2f64030a7dbeac67e722b441c067cff553864276cd4e7d6d1200. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/QZTBD2392809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c02be987858d622360b3e4a36d02f0392ba62643a5078699c017ba0e04af80. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZWFL2308865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a25cd9f691b47d0eeb1bafa8020fbb3d7af5deb63f3f12232b6770909b6fe06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYY2460246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae707e71c300fc9e4a9da4103241d0bcb021fe4daffb6db2470848de61b72934. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA72418324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d89cd88bd80db812cbaa067019fd34b197b774787f9dfda76ff7cae2bd28f7d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBE2428265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946159ac8728a2b68e629f9593cd98d3ed615247b6abaa6656a79d51e0b7130. 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/QZHZD2069594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498033f862b4f69f113585923153ccf2a42a586d9e601a0a0e8a4f1e8868984. 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/QZVK62200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b202c0c2ff4b9fd417ac3fb8af2f05c54b97e314db14a13acaa8848b1694cf. 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/QZHZD1916363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895b2461e016fa1559c746722f254da79cff258cdc3f65e40a4948bc8e7437ad. 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/QZ5FN2151146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0a67407cfd34ecc5972da9dfea1f194cd360801b409a060c46f77482227cb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZDA52037442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b21beeba26163f3fab685a341e6bb5b041a7f31375c4306e5a23716f76834. 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/NLRD51632803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acc809d4d2de680ed4157cc3dc789d6eec0c25fc940fe4e8856b3b579c26c0b. 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/QZHN72053164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3c1c0347944f897d6311b53ad3e707b749611e4b609009f6c2ddf78a1a9733. 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/QZK6N2115640.