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 0xc0d9aa6ae1bdaa61d5e548d000706f1060413399f838455cb9c28a054968da4f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcbf3fdb-7c09-4d61-b760-94b12abed9c5.json and https://artists.proofprofile.net/proofs/artist/dcbf3fdb-7c09-4d61-b760-94b12abed9c5.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 0x5f5952922f0a36737ab85586f8a99b0c86945a9b81d4e18ff12133c73039fe6b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ES71G1903797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c140595cb9d938bae9e3997331478bd3166583f36a5064d20997d0871359dc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G1841440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed16a45c03a3f06ae47cf68c037bcdcf9dd49d6096883cd2897453c2c3673ca. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ES71G1903798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54b233656fb9e38403c72a8b7370f82fe5637f385f8bf3d4d49392d1a66c2a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES71G1910408.
JovnNegr y Rico Rico (Edicion 8 Aniversario)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd225c189d4cf97bc833813214b20d675948e9baef0423bd42dd58abdca50c. 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/ES71G2412224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb212cc32e957b8e3348d3dce97ddf287efd06fe64a8f4b357691e321c41444b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/AUMEV2355365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3b865ac4f00355810f1eaccd92797b976cb01a103167dc76f29aea7b6ed132. 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/QZHNC1996852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971baa4d742eb334794e7638eb89e3b785be5d476a2d691f59ef6a2c1fcf55cd. 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/QZHNC1996857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80acfe7bb119effd8fecfd00fe0b55371c926792e35f16ac844085ddb1282ebb. 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/QZHNC1996862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaeeb014df105319ce90fc8424ccd955d47716f0f19b9ec349cd6fc64752eea. 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/CAHQJ1940411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d27030e494d1c210e0dfb112c552a2db92cacea0365d715749a886fa91d69e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES71G1868522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bd4dd511f11eb77691e813eb68a2c0778c13928c9ca036249ac8d8d67cd5ed. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZHN71976571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94219b43ba94078966a51dc710ce6224badf468b09ac7f0dc3a76912a7f847c0. 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/QZFZ22317863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e869a41794475c11179cf180ba41f3c0f3614e4b444b353c1fa2fe8c1d8964f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES71G1923671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd0a9641ca527781008fc68427a8c3d2ce64f44314b8d9731bcf01909d796a. 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/QZK6P2553553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1ec1990f2c9a694ccfebfd0cddcf004ac400a264bd3931ddc280fec438d35. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES71G1900907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f38f6061bd04ca6c0c7a9243f099d1ea0fdf51951cd504718d70afad2368f5. 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/ES71G1831471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bb3fb324c74e69c2359ea88e35066c99b442e24d94d96b4b3841b0bf887b58. 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/USDXS1600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6838398b0436ef6e987a1b201ef0e709ece0818e2a77205ebca99a94f0bd42. 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/USDXS1600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedd806f0b77bb400525f84d1bd540012dccb3ffeb0b30cbe1ae5fe88a7fd9b8. 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/USDXS1600220.