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 0x13c8b8d004b7990db738d7e0f5c2a740aad560d48523d3bf8a10d0f51f0e0e03. 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/efebc689-d08e-4b69-ba56-8d0f2b3fad8b.json and https://artists.proofprofile.net/proofs/artist/efebc689-d08e-4b69-ba56-8d0f2b3fad8b.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 0xfd23bc17710241afabade19062fdccaa07e798904d723c2dd300f5968338b6e9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM6DC1557717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b199768023be8a819e8578d845366cad4a7846da44b06e0720271377b77f6e8. 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/QM6DC1557720.
Poncho Villagomez Juan Montoya Roberto Vargas - Los Tres Bohemios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf07d18316acfd1c8a875e805fac01822253ae7bd325abee21a26096af3f47a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6DC1736491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424337ceabe6b860476d615792cb5ed62034713089ca67640fb2924e4520967. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM6DC1736492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df01b9fe56dfcf51e396755c32516452ac7de50af9cd2e240a70cb3d82e5861. 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/QM6DC1736493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2555e6e8fda01710aebc09ff6e4b99471739271e216236bfc7276262aea54a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6DC1736498.
Poncho Villagomez, Juan Montoya, Roberto Vargas - Los Tres Bohemios
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e884fc1630bca3fc903e2f5679b6da979b8bdfd9a4cb8daeb95cf8274eafc2a. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QM6DC1875602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c5cf1382b022d3271476f36309f8034d6498e5a5f08e13496cb0b4ce3bd456. 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/QM6DC1875603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ff317c44f1b8c9b9c4cdf09bfae967393eb8294236c8acbdcd281c7cc06699. 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/QM6DC1875604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a49bad66594fe406f314b1f2adcd7709d076739c074b6e4b232a020cf2a502d. 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/QM6DC1875605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa286f14f0e9bfdc3b2691c838e01c2ba6eb2377d3d2e422a63596eabf997818. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM6DC1875606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d3d9878987bd58b7d1a6a66c2f56976df6c3d3a12506b91c45217f2ba5cc7b. 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/QM6DC1875607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7884beb0c7b074e70a7c68e54d2896968c794b92e4b1aceb351143cd71e4f14. 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/QM6DC1875608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f2bc0d09371eb3647ecdd10d11237a18185c4fb0ce3c5182093fb179da3512. 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/QM6DC1875609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52d5edf84b8939ab06c3d37dd43f20bd271b9b89f4cd5f605c1cfb5457c257e. 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/QM6DC1875610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80922c889c82678696907e1446c8252ae9adc885c98de8d7d5ba4fa1be5e3456. 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/QM6DC1875611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08d5cc50edf379589f22f9cc894dd776ad4ceeb7f6b3c94cf3183f1f40ac26. 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/QM6DC2095989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b65745510b9118133fbc20dfc984002937cb8546a3ea589e2f42d78ab7bc64c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6DC2095999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc326a714fc88cc6839b943d7fa93346a5c2089a3934854bfdf586fcda11dec1. 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/QZDQH2106313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23686a8a4d338720cb93b92168b7dc8be1a87483353112619ba8cb5c2a51787. 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/QM6DC1875643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83352b45325cf44b2084e81656c495c14b039b09acd16206acbdd3856d27dff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6DC1875592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e433c515bd3986814eed33bdf6a349b7a2183170c3470bf5b080afc64abad4. 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/QM6DC1875593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0c69821bd3ad3c755fe66d1968c6261ab1f5e31ef13cc7a26347c1e17be937. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM6DC1875594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a4f4e62dd2397988e56082c2c701760ed07012dbb32010f6bedbd637d8bef6. 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/QM6DC1875595.