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 0x1e56e77207cd983c759be84097943db5f8cd091dac4020b6ee76d797189347fc. 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/52559a3e-0073-442c-baac-3cafac8f246c.json and https://artists.proofprofile.net/proofs/artist/52559a3e-0073-442c-baac-3cafac8f246c.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 0xecaad27f9705be2d6775df94cde36581567bef54b02b3700f6ae57dbd663434c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRAPL1800385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3d076655d6097d1ae452cd84403c2c009a70b922a35567b8e0e4e656b53811. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/TRAPL1800389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eaf0232cebe37455e8f2ffd1f4d6a15249af95eefa82156f0985559741050a. 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/TRUM72100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da9c304c7adc7831e4383b87af995a46a4fcf4ffe88655120c04aa21ad981d3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TRUM72100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1967e8405396ac0f9520ce98fe3b5e8887d979181a1bc5c401be0332197199. 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/TRUM72100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203d61512950b4e78d51b8f16e3bff25696656af4fea87db8687b7594d9b990a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:05:34Z), 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/TRUM72100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1967e8405396ac0f9520ce98fe3b5e8887d979181a1bc5c401be0332197199. 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/TRUM72100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eaf0232cebe37455e8f2ffd1f4d6a15249af95eefa82156f0985559741050a. 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/TRUM72100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd9884e609a9b9159c44b57af6e51b08197c05d8870d53b4fd662bd62ec255. 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/TRUM72100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203d61512950b4e78d51b8f16e3bff25696656af4fea87db8687b7594d9b990a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TRUM72100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0ee072b320977caff6ac5654bc3fd2d4ce57eaab07aeeb629a53a1812ff69b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TRUM72100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d16e3590e9a23e52ff56ceb801f6b77a15781a6b8893ed45f3ea544f7a38ce7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TRUM72200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c16218fb47e12a702a2de4536c46efd60900043660e0fe6be489080ef10958. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMDA62264492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2c240180845b1ad71f076d94976476b16c8d6727e68462c5258a829246253. 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/QMDA72218520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963079359ebdff6d208fe936914dd0198cc03dced51d22ba30c7b4e3ab084f67. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QMDA72268044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb131dd829bcd6e73154715b59e8021b366ef2d070e2650965147787114b3904d. 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/QMDA72218771.