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 0xfe2754bade98f5eca025bf50953107d449b501b9eab8f5946b577bb1ef29a358. 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/b8b64c31-12c7-4b3a-add6-b94c65723a63.json and https://artists.proofprofile.net/proofs/artist/b8b64c31-12c7-4b3a-add6-b94c65723a63.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 0x9f7acc2a8d8242da426608ece2c183a0a0e5c9b3a77d28e80369bbbc4f65e252. 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/QZS7J2227242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc925bdceeefa998607cfd9baccc6877d7d3691b23ef4a16ed66f53e273d21d92. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS7J2271049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff42c2b61960e49aaf4e9f02f54c0d5c6b381a588459856468ac7b351de3f54. 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/ESA012225052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a97a96c6631f93cfd37862012c0072f02bd0f3c4ea3639345d0f3baf29b96. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZ5FN2021657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85994c2556313d8ccdaafb67fd1b262c531fc85d923730ae8194c1c8a828708e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:38:33Z), 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/QZHN92145616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6590e479f782ee8f165d6822f27c90a8ccd2a3568c803059a2d2d581092651c. 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/QZHN92145617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e08aebbe47a11e36c405b362399e7a9fbd83adc97058e869a1a0fbc5815d3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:08:43Z), 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/QZHN92145618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32413018ca94dbe34575fb6fced9ecbc12eb14c84630b1f8fa7cabd3bc905a1. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:16:13Z), 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/QZTAY2303052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb873dabade3dffc88c7f8098dab126023e8a3e4780185ef28a733eb7fbee3e01. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTAT2463649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92645d3bfc81016b15117a2361305891278c2774e057543296d3e09dd8059051. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ72598983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ad7aa9313927aa7a4b1d6bfd826866caa301f64ff92c8db636ab74ab76d441. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA2543890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa199d2c2c8e874c858ca5eef971d5f56ab341831dc2af8602f717368c2dae7a0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZES72588675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9dc13e02145479596fb301c1c24b3a8a2705302c8695c4ff7451a647dd74f0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHNA2543891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155f4a0ca1093d45444b71632dd70926c559a7ec2aea606378cabf4a328a88c1. 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/QZHNA2543892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685add53fd43c7cb73ed6cec6a62218f2046200ec1d6e6813ca8da210f342357. 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/QZHNA2543893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906a6f135bfb93806382c7839ecb6699e3d46afa68fd2e52ba457891b1585e3d. 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/QZHNA2543894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1528c2ace7dcbf5822cd502b55818562361a5b070ec8016a2213d360ba91ad5. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZHNA2543895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a05abb50a022a5dbf68887d12c6d8c014eba816eafe343cb8eeae57f75d03c6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:44Z), 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/QZWFH2533554.