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 0x707af1a1264074dc38e0f5bcb8ae970195a94bcba940c667bb8106113a572e77. 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/5e1081c0-2032-484c-83bd-3648d79b092a.json and https://artists.proofprofile.net/proofs/artist/5e1081c0-2032-484c-83bd-3648d79b092a.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 0x073335c7aa187a059c7895794a6130b5c9f978d00ad1ffc95e2af646007024d6. 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/USHM21428867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55801d8434ca88fc6a57df7c7d7806120b508e3f0c0aa4fa519426c59d7aed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM21428849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb755c41ddfd324b988bf48de04d4f4601a25ed9b980d7ea7fe06408fd2ceed. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM21428858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c62e98737198ffe247b6696901ec3a8782ce00d889a0504643c851edfed313. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:47:35Z), 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/USHM21466422.
Dos en Uno: El Campesino y el Turista / Mexicano Hasta las Cachas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07721fe2444110f69a435fa2eef9dcf6d916085a54656ed69055debf0b29eb7. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/USHM91459548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984591edbac81f682e7b852e190833ab7fb53b6ed2fde5416d9632512add45ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1631180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905fa9258728311413366ace5efbbfde5f56bf4ed28139c00b044d73fa0c838. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USHM91656185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe24cc197900706ef719b77c6ff203f10c4b5ba1d8312932f233d01807462a. 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/USHM91663029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2919d4d9d860c74dfffca7085960c125e8340eb46ddb41fa2e0f7d4a77af0d. 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/USHM91663032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61b42be5c744bdd131c18ca636e38e1fdeb635ca375ab2a93749b8e4e392815. 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/USHM91663039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e1cf2d9416f77ca9283ecd1d0265e699d1be15992821b9d4ab2dda70ec3fc. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:02:07Z), 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/USHM91663040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58751c8cd597d6b40ea665c4a56808bc994c4ba249583d9637bb9ba97753b095. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USHM91664260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca2968315e9cdaece4f2ab961f1ecb2f75f55c928a0063ca8cb41e0736f2056. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91664262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2add1e5bd40a85f05eaf977967be507dc91a6c1d86c6590a106dc4c2bca003. 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/USHM91664266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd4d45424cdf59594268a697959c963b4a98a0b8bc06a12c3941fb2d9066aef. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHM91664267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b381b4b9c49fcf38ef7c8e508a0d26e5bd4201792edbe9d7df2cdfb16b12821. 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/USHM91672944.