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 0x0f21eaca409479fb61e94ab53ae2e9966adcc611f9cac830cb080d2c479656fb. 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/e5d0adb5-1aa5-4fdb-a07f-45b9cb624688.json and https://artists.proofprofile.net/proofs/artist/e5d0adb5-1aa5-4fdb-a07f-45b9cb624688.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 0x9d2d50ff79a740a28d2976c1119492f8da4dc0252603e005b9970bf03d25e0f1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAZ2310383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aa451acfaeaa5f3b5b1dc00aa0311d960dac948451da787bd6a768a06e7e03. 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/QZTAZ2310385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdfa0cf413c96b61d143442c22b3681833182680e698adc193e3c05601c6e47. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTAZ2310386.
LOS REYES DEL BOMBEOLOS REYES DEL BOMBEO
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edcaa3cb93ff988b091a7819e1cad7361663aae86bd215f5a81e88f755ad336. 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/ESA012519335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaaf40df9fa5d2122e2ab9f6077cdf64752a1f2237c7204de1adcefc2ffd886. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWFE2407059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ed0ad26583f1e4f18b92cca32fcc3d861a1866585a9ccb903d2d655b32c8a. 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/QZZ7K2441175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f18a1f0048c70131a46d09e80d55cd99d98e46f71ce5d74955aa229fa23e8. 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/QZZ7K2441189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f5f8d7e8a862fb9ac073b01c693629ec640c552930a5e9024a4d2b0bff8ff. 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/QZFZ72526600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57c41f2aaf20a3d02c275969227122261d8c4ffb2c071ec5a99c3a7e8e3a22c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZFZ22563988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c389ada2e74ba740f345994d32f9557d492c00f7a21c461f2f042476a3188b9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:54:42Z), 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/QZNWT2539402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c389ada2e74ba740f345994d32f9557d492c00f7a21c461f2f042476a3188b9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNWT2539402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682141ad70fa33fbbfc93d57f8b471b51fee40037dab8dea5e991a5672bccb54. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA62408694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac75d1a18f81240fb7357c2cbcf86b67adfcf25a0d3048eff4c7dd0ba2158057. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCM52400132.