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 0x396fae847b758991d54c3880b2f6fb8d99325b998e820ca93f7af3fc5b2e9265. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f776f73-8577-4761-a05e-794043146114.json and https://artists.proofprofile.net/proofs/artist/1f776f73-8577-4761-a05e-794043146114.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 0x49dc1c124aef7048fc173b6e1c75d565fd2479c7c3b9d9cb3b76354e234d8034. 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/ESA012280273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1ab385ef4704898a1056c001284c415ade3868891466ee9e731683d5d0ddc8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ESA012280335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01635da6567fb0e8ca616a2c850bfba0280f8542f82aa00203ba187e2c643205. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA012280341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72bc5f653bb7ea895fbbd3eb167988bbfc9c58c45846ff6a1f97ccdf202c558. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:24:45Z), 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/ESA012280484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c74f447dee6f292b97df195e3e3c40db557ea1c1c28ed146ba8f3cd09f2223. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA012280485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e97acf5a8116fdc508feff30ad41c91cce238ea8d9aff819cd45d13b6acef3e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ESA012280488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e97d38344fc3bbc471d372b136be3097d151c9e0b4d41668adcdd37b419f35e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ESA012280490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7192956ce672a191e95a0e1418260845c0dd11c21d0e6a160c58c67318fb389. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ESA012280514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b91830acbd068385ce1d10e20dc15b7fa13a6597dd5effdc078cd8f899585f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ESA012280517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a1c4982f0fbac2a5abb1b5eb7fdb4fe27746d1fac54cd6f378fffa7a5b5d01. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:20Z), 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/ESA012280521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c29d3a30044446022c66d460432ce623802de69bf2e1ab68b901a4874e6f2fa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ESA012280603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20864173a0d40415ab5c3e57b7fc4b8d2d77875bd393a19491237a0b2898fa4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ESA012280611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ca77e31ede6423760d9bba40531ada0ae4081f93dbc3792df0be88536e24c9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ESA012280614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1537ece6549e1ddea88191464355ce95cae1455e0c868e791c5cdc299bd9045a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ESA012280703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575c7feca506ac298684ca1c28e582a28835dd7f01d10813753390e85b41d232. 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/ESA012280707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9079096545deb96ef598cfe35250ab127f8f238bb14c83ae9ae9e184c7f6ef69. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012280708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd08c602d81df348fef079d47a172b14a6f33403a836480c65abe8db9982c8d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ESA012280716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522d6897d71f29b4113e61248e977bed905faacc427a4048204659a852a9eb1f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ESA012280719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9420aa40515158d8b3cbc92c2da69b539a9690842fb4fd28a4b7baadf7f856. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012280741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936c0172cfda751cfa43f9bc664f1b53bd1ba8d0f455a88ef9d5df5c73632b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ESA012280742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad66effeaf9f6aabdc8bcdb7184ca02178aea7fa6c0fc6f25fe1befdc9318c. 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/ESA012280743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366b73e6c965d4b2e15c3a58f0fb2c47678121431790ba442726cbc970a959b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ESA012280744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc87894abe01bd7b324327c7d421f703a39829669aaf6de923980126c7054a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ESA012280745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90eeadaf5b42ff8fab3ededbbb202c45d19e458e3130010226eb8b7f38238d1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ESA012280762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9e9c76d3269f054c250b001209607db8f7c78848acd9233b2896396d7e84ae. 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/ESA012280766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6257382b71ec39f60ab0a6908750cf4a84619f3844fc4401dfbed4a5dfb05516. 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/ESA012280824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e458fe65683316282bb44684ad1e10418970a97887342796926d8ee9d8fb9f8. 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/ESA012280828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7ab2464566ff316a9616cf207e1f25930a96baa8d42f17b1a26ca9ac9b94c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZXLZ2406594.