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 0x6f34d2868231383492fcc545d3f4e1a49b18768b5b16e4e36c341fc5463e3fae. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2498ae4c-dece-4718-bbed-430676482e22.json and https://artists.proofprofile.net/proofs/artist/2498ae4c-dece-4718-bbed-430676482e22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Las 100 Canciones del Bicentenario, Vol. 2
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 0x0ba831b1ae929db71043422d8cbc9aa9c4ce0517053122bce0e9c73174b5fd5b. 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/UYM121002006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab368f722464fa1e2d1bdbc0c075c5865fae3076fbdaf1853d092ea3f567e628. 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/UYM121002009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a22811d36cd12c5f0be319feec61830440d3065fede4b2190fc19d7fb1a29ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYM121002014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f27454328b5a697b73d2585ae8422e31ab46404e7b0d99390ebf7a5e5e0173b. 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/UYM120800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7910fc58a6165f6d7a50c2c5ca7e5d6d453e128a6fc7d336ed4349ed28b1a. 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/UYM121705927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb2e2af7761c049109851554f6add404f40ff654784a83bec404a32219f409. 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/UYM121805641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe806a2db3d5ae7abde0f542aa99f748fedb85553e290a218eac2395572f36af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYM121902067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0041b1379750975b9d06349f3dee840842f17d62439973d393c790bfdc4d41fc. 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/UYM121805640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776421e1d0bd5fe4d99fde565606575c843b1cba9cfec6548b1259ace9849ffa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:32:22Z), 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/UYM122200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ef28f7ec2f65e4815239e14772c12af25fbad909a30acb3be3428117129b09. 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/UYM121805709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ae0e9e7d07ce05fcb14e4f4230d0a04964bbfc4403e828f728da6fcdfcfa2. 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/UYM121805620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973bee5af2cb0f618623fa6dd90f4907e69e3daad1b186e2681c1b9d4e06a265. 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/UYM121805711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e44c4992559d6f67db92226b6027f99db507a944ecc2c2eb64a4add1061a5fd. 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/UYM121805639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb97b1def868f2b4c68e9e4f59a61f6fcdefa5aa2bc430a6aa43090c0b633b. 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/UYM121805714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87320c8df40cf148e2dff789ce6d1b900be2d5819d50c88df2775935ec596c32. 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/UYM121401514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6780a82d894170d9ec5eb061628fb0bf848cdb29dd8d60c10e5a9cf068856c. 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/UYM121001975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71812d2a73d7bb3f1f7bef3e8aeb5f7c72779886cc07661672a6d01e693ed594. 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/UYM121001976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3db0f854060b91edd6792ee7064c7c4edae26e91de8f05ef773dde65a66cab. 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/UYM121001981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782b78e42f1d81622f011254f5b387399130da794ccf5116797d00bf5fcaa8a7. 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/UYM121001986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7397dc1ead121d0bfae2ec2802e49a7b500c04be46b56ba23a36a0632f08f08. 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/UYM121805754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366e72bf21b8170128fd5851296baa7930efd69f1de0b78aa002b693b02dd83f. 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/UYM121805731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879806a1c97f8078b6b27c8f526fa151e417eeadd6dced09aca24701b644e9c5. 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/UYM121805738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59ee5baefc9b7c1c61e3da573c9afb0a1d6dd11e2b458a67c381b0b28c0f8d. 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/UYM121805762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c44850566e9dd1a3e4f496daddf4858f376a4a0a48288849790b017980f22. 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/UYM121805763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bcd3d8c026a2087bcf46ad433a46e92839bbfdd0686c6ce5df44180ef9a59f. 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/UYM121501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6801fb0be8bd7c76ae3c23a1ba1b85501fe538d1a7b22bb566902a444e6305. 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/UYM121501235.