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 0x9cc7327d5cb7c72c2c43646f7046ff6b373d273fe920213d00961701ffd983d8. 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/54974253-7284-4b65-9f39-a7c2b3746b95.json and https://artists.proofprofile.net/proofs/artist/54974253-7284-4b65-9f39-a7c2b3746b95.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 0x2fb9708dd22a7ade0e033b20a4c6fe7cca259bf5c3afc5429c02e324a10c25c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12128184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d735d414933eb944f279dd67e1bc5341df02ab1e02fe3031cab0b3f637287e. 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/FR7X62400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433d46f518d92586106102fa143cf85a78839b3ec6638b5f7c07b0cf010c1385. 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/FR8FB2327870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacbb5afcee332366e44cfb137d3040ab2799875e125434c1e66b1e8a4126a9d. 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/FR9W12234680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53500efb7d323a1c4ff7b387075d3e5092357b75c52549590e1a19d2c917adcd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12010757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a444e20c2fd93e4f973a3b3ef5c6ca6a8031436a0d861f8e471c5c5bc46c14. 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/FRIDO1910964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a444e20c2fd93e4f973a3b3ef5c6ca6a8031436a0d861f8e471c5c5bc46c14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRIDO1910964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e220a69c61cb62cbcfcb881295eda8726b0bf1973619179d3cb8dcf5a22e657. 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/FR8FB2222300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433d46f518d92586106102fa143cf85a78839b3ec6638b5f7c07b0cf010c1385. 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/FR8FB2327870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e220a69c61cb62cbcfcb881295eda8726b0bf1973619179d3cb8dcf5a22e657. 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/FR8FB2222300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01de31de65a6544dd6e4925a20275d723cf85e65d1c850982a85144c0ead0b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL4NL2141547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacbb5afcee332366e44cfb137d3040ab2799875e125434c1e66b1e8a4126a9d. 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/FR9W12234680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a02406167267eb285a950d30c6bb0d81af66d896850a4b1a602132f9abc5a2. 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/FR9W12229255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeb1d2d0424ed02881c56b494db981575b4beaf83566cd8d642c0f438eb3c43. 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/FR9W12226002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8538c8b2df5fbf03077b0818fdfa1c1a5afa30f24998350dabea66ae60760115. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR9W12226001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe906109c9eee29e925c67cc5852725b3648e12148c914035daca9dabd21861ba. 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/FR9W12226004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582988253ed367685380ac18939e2e3685d6fdab8be95088b247bd295161e961. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12225598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6df24024aee23fb48b701c44bd0ed668a1519dbb9f01280ce432cf6cce4bf7. 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/FR9W12226006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0ea9d6217f7bca71f6e8d538203818316bec64fb69145c7ece88758321d363. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NL1AP2003516.
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 0x516ae7a67605da1053e5a1478ba31c4acb1a5205b7f8c6d14b828b2c9a75b2e3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH6541683857.