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 0xae2015c2c828c46b3375eee6a8fc0d2bf42bdbb3ef33f04d91db3710b3c7face. 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/7c674267-6067-4b21-ae5d-f1cecaf86be5.json and https://artists.proofprofile.net/proofs/artist/7c674267-6067-4b21-ae5d-f1cecaf86be5.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 0x52a08aaf9ae7480489e08c18cec1e007fec83e99dbe697417e953093fd4f313d. 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/QZVEM2522005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83be4373252b3246501fdf49c62fcedcf5cd71078cf1eb5fc69cd308fb46d21. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES62323846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83be4373252b3246501fdf49c62fcedcf5cd71078cf1eb5fc69cd308fb46d21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES62323846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d89cd48eda16e5d048784224d93f74d7fbe2a272aa36a6f20ecca9b49eeaa. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHNA2329301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31106d7988800d3a7636ea7c4745d21484a08ef5695092590a9b18d7d2805cd0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6H2329784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910985090ffac67108d66fce4ef6f141b1cce4fd8cbd5f92d633734502c369e7. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZVEM2345248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0954283e62d1316681d29793f8528ef1b33b7e6b4b9f00af209741303717a613. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZVEM2381985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac40c5a90b590274d6f32b26df3f578b2f7330aa95f068f77c3fd944d8c90c7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZVEM2381987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312770813d31f317bd10484d30f28ab6917b72126b7251b73e99f03d90d016db. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZPEW2406485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0e869219a562fe1789822ea15046f2d7f901daa476f6fd37829495e7fcbfef. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TLVEM2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9bd7df9e08d40093022d2dcacf55637eeedc3e2ddba452cc1a6e1e5f68c851. 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/TLVEM2403925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aa62fc0c2bd57ce7aef6143ee4eddf4d6f66ae05f27918804661286213acd8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TLVEM2461279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc192b13b53589e362562f73c7b39e51dd6977086fd54fac830ecbf24f0bc855b. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QT2VB2472993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53160e411ab22f2bb850798ed60ce016d99efa28283c6fa2ff42136411b7d630. 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/QZVEM1803538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb951d9dab7190094265233efa0fb320484c854b72e743a72ceebf9034e883b7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZVEM1881971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd69f60fca8f0a9f08bf95e8fb407b0b6cfd5ab9d531d186fd1ff447ec4fce. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZPEW2520370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd35f33901ff8c11504109a595dfb64c6a0715b6c435064e4d88520006a6efc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZPEW2557380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21fc4cb81dd6f1148e57c31e0e77586e7bfb686afca4779e416138df7159a5c. 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/QZPEW2589903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf70f3c65986129d2431b0641d7c15dd2f3ebe0fcc85a4dd99d27cb4dea2a0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZPEW2589904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61d8cbfaae53f00aadb476c5f1c8b27839c3e17d48108667edfe63c3aa5e74f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPEW2589907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40cf5a45e78a8dcd9b34455cfd238c00580ddddd112d6f0406ed367cfe3db5c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZVEM2531077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699cd0ecf3b01e11d08b61502b0e64b7e741b9932a329991afd34391a42e0d21. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZVEM2531078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b2bd26fb3a181a31897616266b47829e4d3c96c8fcf0f2f79b9380b9a7e70c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZVEM2531079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840bef6f10ef9a017dbcba74f28d5aab0ff134ab8e5a77cb83aa097e171dbcb1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QT4K32558262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae8e192453a38b957ad51bcebcb9a982ef5fce56dddac39e8943892f9ee1cf. 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/QT4K52566754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0745fe5f61bdff9a149fec4fd022c226f05ec37e50fbcd115775ea8fa45d4a4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT4K42505319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d9405c0f04dad6d014b0308999fec68b29d70a8b32a64772ea1b37c732356c. 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/QT4K42558818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01969d5db0795bfbf3cff27f7ad40cb0ff324cb5b8d6c3ed528364096435bcfb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT62U2550437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c931d4709b330c4e8fe3926dc1dacca30ce89fd226f86979b4025134171abb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZDA42252631.