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 0x737c1ab643f4c4536506d1ee827d6adca91b5bca4c3549467ca0ab3a70c91203. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e80c1893-e19f-4a57-8374-098a9b8d5c73.json and https://artists.proofprofile.net/proofs/artist/e80c1893-e19f-4a57-8374-098a9b8d5c73.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 0xe022d05d7f76cdd3d5aa6af9985dc49964031ca9bb5b5448150feb9c68dc631f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:26Z), 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/QZNWR2422479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d570019bb0479fd1a2794985da62d0bf72fb22f3c582a274eaac9fcf8fad739. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWR2478804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391bf43c8e0275b248346f922ea2a92742b5f8f1a2837944853ef3c9c5b42370. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2488027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e1e8d4022b021bb84bd606a7e5277f47bd93bc76216b227cb62166954a2e28. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:08Z), 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/QZNWQ2406619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cef76256466cc9469e55eac61d7b407eded21a4db26594909dc97f1d09d18d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMER2435423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c0aceaba0d8444fd2eb1953c40b00c3d9ef6b394ab11d1c73be93c3c68a192. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:52:22Z), 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/QZMEQ2443094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49711e0b358a9ade609b939d12c00dc52b24ad8708612962a2ddd394b7ec52d6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:54Z), 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/QZMEQ2490813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927f7c5d0aa0032b31c6772a91aae1656749ffbd8c6508920cdd4e180d238016. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNWR2407900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904672f64545cbad2b8a8151504f05cbb46f0a25a2087dc95328ec7cbe32a172. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMER2417503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb15d662a45c49b3e3b7a638bb216d3cd1311590b1c9fdb7df0e012cd4b31f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEP2455089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdf68d90cfe476911f6ccdc5450c711c0f5f40dba2ad248a8f05d569a3fa367. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMER2428500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335de7c86f8a2926292176900fe6351c294afe19f9631a535344a7588f7b4725. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:56Z), 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/QZMER2407739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e15b25aa2239f4f5bb3b494e4b0efa5503fbf09eafd0ca6cc6d7c6d2212a7e4. 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/QZMEQ2460170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f38092fad7f6362eb005f20c89bd4ea48c99d4ef1038cac56df006cb21399db. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:59Z), 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/QZNWQ2459320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b9e7265b9a30d863547202e7d529987393ca59fdc6d2d779e029b7b4d6085. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEQ2485953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac639a6dd5cc09bc0a8281b8b57e90bb22d3a26387afcc010b238c7f59c03030. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWQ2444053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0cf769d567ea59be2f50b3736de30aad687bdeaf698113aa816b3b6d54e8f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:39Z), 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/QZNWR2483363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1e2691667c237cd5c782a25ef94e693402f39a9f65cc9d53beefad54d649a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:52:03Z), 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/QZMEQ2424766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453405092247209725ed63acb7470e86f2a3d6f04125215a76d6adc34d2cae00. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:52Z), 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/QZMER2447312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f645d313c43cfc2520bb19af97a3f45a18ec29809ddea5efe2a2596217734ae. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:13Z), 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/QZMEQ2463360.