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 0x2e3ba1e21e88e77c124e34db70415d401695b5963f250a71fa27b869911a62d0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1187ce4a-da0f-43dc-b598-dd2335830c97.json and https://artists.proofprofile.net/proofs/artist/1187ce4a-da0f-43dc-b598-dd2335830c97.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 0x7994ac664ead28f0db03fa785d23df8ae2ef368fb5f1e21929dec0c1b094a760. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZW9K2238976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5014f02494610c630bb174d9b5b443b66045baa30c8b008610fdbd4d2cf0cd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTVM2317805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2492ad0a83939652076ac0cd03f946388b8120fda01bed149227ea4fc7055f30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTVM2317806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd4e45bfcc494819d3c0844c6c49fa26a74176b33aa7fd5b32a4bbd645b9296. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCADB1723475.
El Juego (Acústico) [feat. Eduardo Iensen]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8977e0e165247d8c5ad489deef2fce861acd3dfa526d888842dffc092dc6ae33. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADK1722075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1e462f4a7d42aa5c8f20a417f4efe705495e027922f4d61e817ac2be1f9ed. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADY1813253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78b7a1e2d230f9ff0b6b636c6ddfd1819ad4b0e939da57c3a17a8887204c525. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAED1993222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510c02c2077160e88e5f4b95905c0086d2f7847a30ad73c252f103dc9345366. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLS2022972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3431e06a4f3aba7fb1276d065f9c192134a939b1d18485550a9c97591c84bf. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:51Z), 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/QZNJY2018073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f70456c9d56891f07f8a1f324a6948621205f03ca76d5042004b9e3f1b19f15. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9K2432247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23085d3ed1b1c78343653d86e869e42cd801dea01760205a2d49f4dee41b2c. 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/TCACC1426398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d2e1db82d35d60bf0c57658569b9ceb1c858d86812992ef3eefa715e112c4f. 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/TCADK1710602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c518a63a0b4d7cb6196928c9598faa53933e773aff8eae5ebe8c97bb66dcbfa. 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/ES71G2045969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5528fda8bc6785573bda8d0847738430ebbffd506692fe00ae0c6e442f87ac. 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/BK4DA2520909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82571a77b6c8e992a4f6abf1b453cdc5516518bba7333cc130d28b576da67aba. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNJW2061357.
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