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 0xa75a661402c768189ef0be64baa85a72157db9ca1ab5f44e1b1a67bc8cbbb34a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73faa896-2b08-4019-88c0-d44af258aff5.json and https://artists.proofprofile.net/proofs/artist/73faa896-2b08-4019-88c0-d44af258aff5.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 0x59b1f94e230cbcef6124e3d315c7a07c74c7132c20e874de7e08dd2bf716ed03. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBCTF0500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461051bd0b908cd0cad031f0b612a37fb20daa1c6a203b79e24614813e47ac07. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEDW90900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f41a93a6dde44e61c929015e2c8050e3bac48900f7921d5cc9cebf385b0afb. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEDW90900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c7198ffa9eb5f96dbcef2e60a158a013a96385162aeba64945c287061c77e. 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/DEDW90900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7bdad78ae556bfb245db701fc6a527d5539a8aa32b7e37fffe25bc8be20b7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEDW90900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d36e6ea9824a6cceed80e45bf59dee7089b6dcdc48c833b7e00ea42b11025. 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/DEDW90900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca615d1ae26b351dbb439d5cee629f398c1abff607e3626477a84efd187bfafc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEDW90900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f2072fcf409ed9561d8fb73cecd4b38fba46d200d7073069a991a87ace0086. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEDW91000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc7f4a559f1a3da733c314588db24ba9153f57620e6b39beba28cb0c2093afd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEDW91000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538fbf3d2c182dd2e8cb8677254756969921e6a54a4b00d47c40f34f0212e54a. 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/DESV91645801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd314c3117ce4681a5ce286cdfeb31757892b2110a93a114f2cc1ad8e284ce78a. 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/DESV91645802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ec6a2e6f41fd4fd241f977e1f23e73aee1be1f0ac4b3fdba2b9f66727b374d. 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/NZRN00800015.
Humanised - Moo Istanbul Guitar Check Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683bfaa479d5ffd155fab72360b2232dc11223bec1d23729bb80f41c00e8dee7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NZRN01000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36383de1d474909b8233d3e101efd443ca3b30bf1b34e9402f7256841f5dbf84. 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/NZRN00800020.
Sunday in Bed, Vol. 4 (Sexy Sounds for Lazy Lovers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0443101ffe7768b75d4f6a7bc5afa5132e12086e8003601a9df56b84f2ff431. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEDW90900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab781238bc260c18a0fa11d0a1bbded5697ec8b42e591d971d56a48df999525. 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/NZRN01000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dde17060993b817eb47431d1d4b498466b70dad99dda7acac6c3f994cfbcd1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEEQ71607510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f7d7776bee4e6dbdc10712097eca23156389d940134240842a82b07f8467b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NZRN01000015.
Humanised - Jason Eli's Groovadelica Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5f90892f03ffd0ba66d09e510cd462503f85b693be42292b664f1445007951. 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/NZRN01000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214e00c265bb1c4e9843d2f6ec90c8eae3df6c6d85f004cc9848f05a13f88350. 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/NZRN01000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c587118b2e84c04c654702125b5404377a05cce059cc9d9594d7bc51202abf4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NZRNO1000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91c3a6262e86a41e4200a54cb25057afddb15ac68d90cd9ee94b3462da14b3. 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/DEKF30800059.