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 0x8655407af13bbdef776e411ac5d4024c88014c4484e6f62101c244b7a2e58115. 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/2896af27-e85f-40a6-9911-c770ba9b5c4e.json and https://artists.proofprofile.net/proofs/artist/2896af27-e85f-40a6-9911-c770ba9b5c4e.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 0x4a2ca282b512cc73131678e9c89066cb1a42795660054c1e563d1ce35b57f19a. 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/CHC652300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038fec7b41e53ceaa24296470c3b3a85639345719b26024a1dc510e3389f25a6. 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/CHC652200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e62ef2bc77d11bafba6466c1f427ea33c4029da682d349779d7244eee061a0. 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/CHC652200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ba4d8233ead245b97c85d9086976e0844c607b763265eadd345ce3f459b8f. 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/CHC652000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3103e202c7a391d7b8240999bc1d8ea0aadd83828b34421667821dfb936c5. 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/USA2P2356671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b6502a6a0f0be04ef4cba1012c5a5247a369662507c10ff0d83acc719c10d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHC652100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710e8257a6fb5dce70d70ee3c0d833edb60aa0adc811c5a40812a7fcab50143d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CHC652100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca92380fb68e71b741e1b2d2b40580d3772fa048ad7067dea1d00e15a95e3f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBJX32117007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb8c72ff1b5b5f97e45e0ca8d5b943d114c8fd82d9456a5830f52e0c1136bd9. 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/GBJX32117008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d5fa2e811c88b1e9eb3446e918b93aa5b35e49330fea2b84ec64819d5f6a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYW2183831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe508d4932fe2dce80a56cf34ea09af74ce67f5cedcd12c3ff3cfe0b23b188169. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHC652000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec5bef6870c47a0d4421e77936b4c20ae3d9e96466d7ea5576a5ca886e25c9b. 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/CHC652000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf035b038cd5649d054445e992e4c6767a620105c3830e65c6b49fb923a094. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBJX31612022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70baf945d513dbd3c4609449ac2986b04fae24098abb836f8881f924c061f4a2. 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/QZFZ21976480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f93b3541dbb6fe145f612470a96849a9fd342ee9d27288c3f1d06e6ef26ccb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CHC651900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31240b705c59e6b25f904445e7c961b88791983ef4f5039c4e1ee91664a7d9e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CHC651900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a8637f0a2f1332c2127eff2cb8d56e8311f68effb86eaf3c81beeec555412. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:26:28Z), 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/BEN581700709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e027f555849d77cb67844a17025520253b2626901afc19b3ac192017fb20ca6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UK7FL1400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5f4a9c2fa12ccc2920c82f9c0ab77fcc235baf8c816379fb3f2080274e9806. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHC652000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf985f9d9277c8d8a9973dc4f7b4e310b0753f454010f8c870be9157fdf39a0df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUXN21938086.
Global Underground #43: Joris Voorn - Rotterdam (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc878198786d15982e7066e99c8caa0b132f31f34bbc5b25bc724cfd786a90731. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBHFW2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fb328cf78570752af483350f992372d737d6049d2568e4c43663e47b64297f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBHFW2000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ba4d8233ead245b97c85d9086976e0844c607b763265eadd345ce3f459b8f. 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/CHC652000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e34bb64a78793dedbbd041d5bd8f50adf13644be2c71ea40792de28213c84f. 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/CHC652200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63b035f6d969c078d315afda25f24ac4a11e43669f3ae5d38f8329762d97db. 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/CHC652200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7dd2b3e10efe084e06f4b6ff19d5cd8dd73a5490264b751306195810725ed0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CHC652200122.