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 0x3044d33bce51f73cd8d6ae1f7adddadb352a002195b3515270878566abedc663. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aee39af3-7a8a-4e33-835a-6213a8b8cab7.json and https://artists.proofprofile.net/proofs/artist/aee39af3-7a8a-4e33-835a-6213a8b8cab7.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 0x295759c1827396d0bd65a35770e76d5c98169b9dedf187b7dc885203975da0b2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BCOUC2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16d88fa7e053c5d00366694167c3aa1bb4209cdc70d76153c4d54e835ead71f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BCOUC2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1f3597bf646641d40de47b39465b1eb42653760574500d339ab0f44673649b. 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/BCOUC2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f8c6163f58f1f4e5ae61d42c60351457404e69f483f9f40439bc83fb9b62f6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BCOUC2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9214a151bd6b8fe653c44e66b3f3de4a4b7f18ba17db6543ffd3669386559a3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BCOUC2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa5f32b410e58a1c4752bc6b9e37684e76779f323fb68ad302cfccc7f30cd6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BCOUC2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c63a751d4c50612068ac819a478f2660c113522d2c313ab5553d4dc918a1ea. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BCOUC2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b0843cfbabf2ab4e62ecda8b64a73710c63393acfa47cdd6b41ad806480451. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BCOUC2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96987f5ee6a4d15d0f358ac9265fce8efd22842923927bcc26b5e3b3c2e8cc40. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCOUC2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6ef43bb145f43757c1368156b65f4be79124f0cb3a81e46c089f27404581e. 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/BCOUC2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96efb232a146bc09531d7d92231fad5637abb900fb92d52d870da6fdedbf1e81. 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/BCOUC2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fb460873d182291e0a619abc6dc7fb93e021aa860356e667a2c0e0771de350. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BCOUC2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2916a01eb31db0724bf8f148865c07a40c6c99d3dd48ddcf2d0345e4c7f4c1e4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BCOUC2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc0a078b25f70a93417e3910cd1fb48acc60d4f101cb566c69825a35e567665. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BCOUC2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc099fd3fee324ac452ad8701792f49c0ee163fd4ecc64ad46ffbd17a557f056. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCOUC2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20368ec3f09f75a5ff0e3ddfbce37735bd1dd00771018b3347c219fe266aa82c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/BCOUC2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f1af18e9a14429263ac4308d05dd676201fa09f9ddf7f64b2ac99fc7019584. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BCOUC2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc0558c5dafdeb49e9f31705dbb4715b13af081418d7922d41025fcbb79fd0f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BCOUC2500034.