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 0x79004389fbd111a42b2e96d7932041725638657a2392d02f3650004900f82043. 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/97d57b28-6ca2-403b-a8d7-46caa979ec68.json and https://artists.proofprofile.net/proofs/artist/97d57b28-6ca2-403b-a8d7-46caa979ec68.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 0x6f68481f04e337cf2eb88d5312b91ac7081f8a8269cf39e8825cebc42e8266dd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM20617370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5a599745d5aada4f669210828bb12664bc98aabddda29b5bdce8167c7377c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USHM20617376.
We'd Go For Broke (But We're Already There)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a129613126ac2c4043580dbb10325aa4a2b71ee0b4aa248570709cc9965a9e2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:33:08Z), 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/USCGJ0940820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00968c8c377d040dba4610267a13f197ef41703aa55729fe301aa210e5a4ae05. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGJ0940821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace407e2f7c278f0f0cdfffa44746a79679273195f1110014521a615fd4c467. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:16Z), 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/USCGJ0940825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265ab382b5f17c374ed6e9e3e3c76757d01c5a53d0b71f0483df00292f31880e. 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/USCGJ0940826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb53d4d40437c3c012d42bf4d36bdd8de3ec2379cd37776b15dac991367d983. 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/USCGJ0940828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc4b4f07c57b5a07710944b721bce4d24553bcefa097042b4b2a24bd2bd7bd6. 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/USCGJ0940829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2ae21302f348227d58be05cf970d6cd42fb6fe211a3a8053926c71ca0e47e. 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/USHM91062600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc8f5763fc595ca0fec865a5873bdf2494df82421b21a280b9dc1affadd0fde. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:20Z), 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/USHM91062602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c8890c3dd39e5a9647f2a40f607a46cc5f0589ffe7102b00ad9eff3683760. 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/USHM91062603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f35bb3f2a9dcdebe88d4f87d1263b741871e5ebfae2bfa4f12e49b26b6860b2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH1196724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0428aafb80a92092deedfad1d65286593339cd024bc4e5dddb6182a666f3a. 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/USCGH1196725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd16e07a115f3302f0a07f1e6da2d0f2fc8ce8e7b5b3552813d46dd00f2a5f2. 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/USCGH1196726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f8185dbe8e1d569b5f7c6a7df101937ee821983b6add2c80991d88c23479f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGH1196728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf835b854cb870db5dc950a3f341d93abce770c2048e32e9269ea8fba15ccc00e. 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/USHM21152946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb592835a953fc81c2a5c6b0cd23d82eb8e7fc515149633bfd52c4d9dc6ae3c. 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/USHM21152947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b7b250a1d1ad7a7f6b45c1ccfadc23b9bb5309cfc806ce6366eab23c942677. 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/USHM21152950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8be1ba0f6cce51d5127b9d51bc1d5ed9fa369fc4b44017feb6a80e1469f79a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USHM81297905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9578a85d1bf139fd899abe2143f0a85f3a7cfda6617cce3ff221bf6678267b1a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM81297907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b3ec70a378f5530ec4a2a32fb38ee08e6b86fd728de65adcff9c8c4046e743. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/USHM81297908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77be982a8b0135993ac6f49a8415f363b2222269e60affa4143272143c05091d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81297909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9a18a5949ec8f749bad8148116099357fb4007f84c6b20fe68b8977857c11. 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/USHM81297910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedf49d155709d1539724a6c28f7471f18e30cc934df074f2429f2dc3b71c8be. 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/QMS4L1350932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01642ef1de6f539b229fee75eaa88556d730b2055e8ef7f04e890eceac165e5. 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/QMS4L1350933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80bebecfa44e9b7427bcfe5e84277ad2b9429252fb50f92ac80c195962bfb00. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMS4L1350934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9469af272e77f4a92a22a546d299ed7d76d32b3cacacd09c3a670f8a358908b. 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/QMS4L1350937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ada9451169b34294362d8a351c9635c8fe4478632452e0daba5a54d08e9f5c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QMS4L1350938.