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 0x8cc30da6373eeb7226d9dfbe189034e95ba9a1c273e115f14cd054221dae8666. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bf92abb-67e7-422e-b4f1-9a9ab4e116f9.json and https://artists.proofprofile.net/proofs/artist/9bf92abb-67e7-422e-b4f1-9a9ab4e116f9.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 0x5446c2b6921b81cc46c72d1d076e748385f4fcb6b952ef2d9de308d4817f26ce. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:39:35Z), 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/USAXF1010184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69bbfbd18bfa1dc94cd2fb352cddb99c4f419ba617495177c5d07435f2d6889. 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/USA4N0303631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed5455b63a7f48b12e669f13706847eb8c57c44b7e6091236547ae67454e756. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA4N0303632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ad835fb10681937db0a7737d9a70916e8e41cf9e749af06a7fd46d538a2f20. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA4N0303634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6638f7f7d68fa4193cd1ac3fef082bd3c1799ee71ec35dcc16a72f8f5b2a7bf3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA4N1200700.
En El País de la Vida: Cantos de Alivio y Consuelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f90bf31c45c5d4faf24a9d99f9745fa901e246bf740c2e3edf2b981dce319a. 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/USA4N1200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ca458898c6f02712005fc047a773f2688c785174ab6003545bd1eacdb3265. 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/USA4N1200702.
Salmo 121: Con Qué Alegría/Psalm 122: Let Us Go Rejoicing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55aace57cf09d1cd1385cc6cf1869c10dbd025183be41c9905d4deed0439241. 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/USA4N1200623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1adafa1de55df94d946a9d059a1835530fd752d7a2327d4b76cb10acd76cc5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA4N1301055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2569bae91ad6d5d43b438015d4f6098738bc0e51451e02e11efb6b2ece89704a. 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/USA4N1303854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671820442a0951335cf09226aaf681fed5600e1949454021aaff9a2532557264. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA4N1300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea62c68876c3137a200744a1e574e016e84ce135c9ad40afb8ef16658be31f. 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/USA4N1300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd570f71f3b6daf491b33e69337fcc8c9b19a5ed0b094b72cbdf642f483b8e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA4N1300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacfd7ab07ae721753787d6a9595c15c5c65dac7808456c5f7768aa36a132a47. 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/USA4N1200946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91389d9b83fd5af34b4390adaf238ad1120b2f6b8f182ea271b40eb81adfe5c. 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/USA4N1200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7ac38cf96da4220bdcc5bc116b84c136481bcf3f0c089fe8af85566df0c08b. 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/USA4N1200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1206f71704ee31af2704032065c2a73383d2f4685fc3269020a15afb9d692e. 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/USA4N1200626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f27e693e85eabe6fa3c832e41339dc9328d8def5eecffdb39dd13339a8e81c8. 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/USA4N1200461.
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 0xa06b670d878e0cb972519f0dd998594a7fc22863bd5e77caf70569d10df9a3a6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA4N1200936.
Sal de la Tierra: 50 Cantos Contemporáneos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b1891692fc593a0608eab47993d3b14001276e4bef16d98cbfaffd74a14199. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA4N0600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ea1eb3187d1b02cfc3c1f2c4d43f2997d80dc51f5edace0c08bf1360097d4. 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/USA4N1300899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39cb7d774302bf24cc015c99dae433bd81e2a019a08fd6985d793318b1021e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USA4N1200619.