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 0xe66e8d7548a5d86ec0e64ce1557209f09fa3d65967cd03253ad1eb6eb85724b3. 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/7560d34a-a9d0-4515-b51c-bad1b6ab551b.json and https://artists.proofprofile.net/proofs/artist/7560d34a-a9d0-4515-b51c-bad1b6ab551b.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 0x9f0829993a8dce0738ba26c826b96c12c53136eb6b39c3f93c45b3bb993da399. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QM7281824175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3369e4e47b5601102b3c20fe5c4713d26d31a39c779212fe42096e0f53b2c9d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM7281824176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6089a4912e430d3658f7922cc8b22f3929487552def635ae8767c826480bfa. 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/QM7281824177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d526dbd98607221f965d15369bc5d4cf7037ed24d1f5a124b43976c0e4e89b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USZUP1110134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a278764198de9212ca2bbca29a7f606f0e0df6efaf4338d23aafceb3fbde6b. 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/USZUP1110136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81568ede383e5cc116582ff642129c7aad38fc99164afb736fa7f28a02ad342a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USZUP1110137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d062f57535e4cc288200e9340c7e119cb0eca27086039316e600bafdbdc0978. 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/USZUP1110142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822ea6ffdb4063efdd94f3479e23e6dd0d2636129e9410573991c585f83794ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6MZ1960556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58dd40b7be9ce4042feac354b1aeaa162c2cad0eda698c043f4df55c798178a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USZUP1013346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2168b798a4490d624a87ac49478c84525a3869641eddb916614a3ef5d137313a. 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/USZUP1110123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df45f0b9e2c9e049d2cdc1e5e0fcda783805e49b2b88ffdbfb4161eeaad0a2e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USZUP1110126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ea6fa3d533e74ab192955ef06c769efa5e867e735433bca616f6ff459684c4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USZUP1110130.
Baltazar Herrera y Sus Rayantes del Valle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c41035d06641309e3b40d3f7037e947e5e5cd567cdc1ec310ac9a00d837f4. 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/USZUP1013324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c09bc42cf63c6c2290cd820352e8396240c07b0a305a3d6146a5b65d25477. 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/USZUP1013326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497418ccb290fd47bbdb16957caa6bd60421a565a9396fecc25c87b18700b199. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USZUP1013336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1465e887ac350c1cac0b204529b4c7444558c45be070daa28272a8318f96130. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USZUP1013339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f912e5fd7a69ecb2f9552e4bfd67c6aa1da7c7b97d03c2f03e95c9acb9cb42. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USZUP1013341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3025f5cf9f5ef6a4d6ac98d05691ab416ab9ddfd0ce0713ee96418442d4e7c14. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USZUP1013343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936a2fafdeaf4dc9215599644564ade9fcc9bfbfea3fb9da6ee324b456d313a9. 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/USZUP1111362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e05bc6ca38e29f721b8ec3cb36131fe37f2f21a33e17b2156f71addea54550. 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/USZUP1111363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f37631901757deeb142a42f02813fc7d3cdfc61778d064d3138086261db5f91. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USZUP1111364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4136bbe5e8b468ca18346d4362baefc96af70f2149511e667d78239c39a51f3. 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/USZUP1111365.