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 0xf1c161bc7f772ec8378a504433e88bb29d90c84f75452ce50fb750fbe31d64b2. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/028254ed-cc9c-4cce-aaa7-348e5175e49a.json and https://artists.proofprofile.net/proofs/artist/028254ed-cc9c-4cce-aaa7-348e5175e49a.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 0x8b383add62edd916efe454f0955d53789209f2202b6d619a4461bd2e3aefb974. 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/USDY42381347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b015ffb68323950137eb433d6c259fed0a98d379a2e0a39a7c1965baebfcc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY42381348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834ff304aa56dd26620d090126b4dbe678f64966616c555899f49e274c7e52b2. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USDY42381349.
I Saw Them as Their Fins Were Splitting the Sky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49a913cf2b7ce3e0c3d1e952827f05e7dd2da64a3a03282adf87c559e453ed. 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/USDY42381350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c242e691c6881f23f72e00003bea97b59af7b233516761b8eb09c26aeb2bb3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY42381351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be4ef41a614a2d437c74a479a2ba2b2e00ae5fa5e612a77e81c771e922d386. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY42381352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b26a7804703ac9389e0fc270a121708e7e9269039b12131ae52809d45e7153. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDY42381353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ee889775ddb3c47b46c70bef6f716646419b715133eb8de1be2f94f5177c8. 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/USDY42381354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c790012a1d861b8cc9e9010a58c29b5bf48a75f3a3f62041fecffdc08ba6ab8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ2259704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c0809769270cdd7c711d03386c8a5e72148e424a43c800e7afcd49f3aac77f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGJ2259705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fafce5321aa00cd3305d979620d6416b6e62f44ea25c4cf91dcd50c21e7453. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGJ2259706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087654d073b3309b7bd1dfdbe20816beadd61735df0f02740013ade1ca9be83d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ2259707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc1781e641624b22789f58975ea22261824b1d9427639327df6d10099acf17c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ2259708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5b2c38caffdda3c1ad1b378ff54640e754d3289de425d2ea9092cbfb51ccb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGJ2259709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f0d3eee59961a2d7eccd856ddffc4493f0339dc2d3a0774ebdd32eabc66479. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ2259710.