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 0x48990ccc20b572600a650a4efde84bb2ca9e27183282d68f255a0adac7f4b214. 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/da2786a3-cfae-4f02-832a-ce422dca73e7.json and https://artists.proofprofile.net/proofs/artist/da2786a3-cfae-4f02-832a-ce422dca73e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Canciones para Bailar, Jugar y Aprender, Vol. 4
Canciones para Disfrutar (Karaoke Version)
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 0x065fe710a87f0e50bca7e33a47438480ab92f325fd3ca7796ad2c212f961b408. 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/USCGH1904748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb1a0fa70dda468fa3e29b3698fd703b505d0b7694c899b8b7b99890a354c8a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USCGH1904749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e43c986c8d9ce649f351eff0e00fb7e67d88ba22d684ad29f12a4bd9ddfbd73. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/USCGH1904751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118ba3c6207666324d9894528762b6dfced53d4ab5c55de2640a1e391c20e0c. 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/USCGH1904752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93431aad4015e9f1a873a63ed7a0dfa5c6e9fb1541a348b9c28ab8fe1e95a84d. 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/USCGH1904754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb343ef4fad4c6f6f93d3dadd61d24d512eb898bdba3c67d68d360d24ded99803. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:12Z), 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/USCGH1904757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf38422b6c5c275242786f4884f24686dc356466381843ed70db9e5f8a74ed44. 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/USCGH1971250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3c529d786fb54a7e4b8c9f96e69daf53850a7b742d11b16dd02a69e99d1a2f. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USCGH1971254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886185c7bb7e1c3dc5ebe9cf0e215264f93e4d01f957b99a03d6a0f6bc269f23. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USCGH1971263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c257fcee148514f3c3faaa6307a444d4ede7d89dc5e3fa490fd8717dcdba5. 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/USCGH1971265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1475412096256f784fc801f26d011ce35d84cfaa786a6b05e2aabd9e592cfe1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:35Z), 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/USCGH1971268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363929dba4a0c8bb45596503f478f941bf253d0ce64bdd4e83c37849c2b47b28. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:42Z), 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/USMH92313743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e426775d12d463a64eb40f22fe70c647dec216c01283b87ec840e93c14a5b1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:35Z), 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/USCGH2479825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed4264bb58a04a323c3758d7bd7c4e2fb393cef2ae9c0cdccf889b17e00143f. 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/USCGH2479826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc186fa0c23f47e77c0ca0f72a2deb8a87fc6586655ec31c39ca2ab0c0dcd7299. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:06Z), 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/USCGH2479827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2437ca745d52d05ad9d0b36f490f8355cef72493ea334350b757344e7ca2f0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:28Z), 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/USCGH2479828.