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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 0x6cbcbc43e872f0784e4fa118868d2c44c29e22045314993b49fe83e219b0d113. 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/4a52666b-e229-4ec3-b1c0-fb19483ac9ac.json and https://artists.proofprofile.net/proofs/artist/4a52666b-e229-4ec3-b1c0-fb19483ac9ac.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 0x369a1d0444cb0e87bd8e75b6c9b6f67f23505ca0e65e37f75a24a2609dbef6e6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEUE22083878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d19804b8196bf0d7e4eac8337bc8f7b3766bbdc73c35d61131e5e3087d08b4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:54Z), 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/DEPI82319754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142afeb629890ea334c67faf6d4f4c5d85e1e94a9c894d41a978ae474aa31e73. 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/DEPI82319948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c45e70056df32869e0ddd99c993aa6fbc1992e6da563f32d0b108448f2dd4b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82321956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91b9ea7842c8e9e06f88b0f9077cd3adbcb93fc363cc032919802935d3525f4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:38Z), 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/DEPI82319950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccd56cf2e6b8b59900925bdedaf5c3dc9769c4baecfbcf5ac0d04377129ef2f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEPI82321557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1955cb98c628bfddad63a8c37c7d110939831908b039e48ce3cfecafc9370b8a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:15Z), 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/DEPI82321957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eef2db2319fc8312d8df7164586e1d30000a1b925f71c4533019062dc8603a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEPI82401363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a02e71fdc4dd9ff9dccab5eb794a2afaa32ac776c1c5991bca117790c9f78d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEPI82401396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6945677d4091ea1ccc7bfb6599fd1f99d9a0f389bd4e939d40a864e6b6a017c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:38Z), 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/DEPI82401463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714b0ae945dd98adf3f2047214de9c10a6e7b2d28ae621d87c479b0798354166. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPI82401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3d8cc18ab9807cd95dd87d2691ed8f7c3eadba5ebf8379d19611517808bf5f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:22:03Z), 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/DEPI82404596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b4baee596e05a0c8b1ad0d31d777d61b7c524cd8f4a28d37eda35226b55479. 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/DEPI82415403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187f2dc306c99342b7e2099bc49208a36862cda1faf4e5e716e443b91302e36. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:02:33Z), 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/DEPI82415404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648486e21b47c0c821579dd14692db0c0a71ab7a6b1c1b05a24094c4501fceb4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEPI82418774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf564797d242ab95b53d6836ea8f46f15887031d6d0213ac032b66606c43fcd4b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82418775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd7ee8a5ab67897ac0560c87cdd9c8b17f1674fba7a772207b3f51705e2672f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82434380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47f7607c827f91f45627e56786019cf9747579275b48bc1a4d738b0a6808c5a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEPI82454177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd380b99f54c85a8928a2223fc0f2d47454c0cf006a8ee6c7853040ce717e8f88. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEPI82528123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cbe49762cf6f87859be2e42dc7d897cd8715018cd58402787b438f3c948d09. 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/DEPI82562497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe403d110640c82f55473609c22020d980dd562c6003ba9dc1c7e3207b5dd91ba. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DE1QW2502186.