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 0x4689c4c49e091f0904c261dac69894ad103245ba55c4fcfd04e8c0b2b6d926f6. 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/d010da68-927b-4db2-97d4-757f2a1b98d9.json and https://artists.proofprofile.net/proofs/artist/d010da68-927b-4db2-97d4-757f2a1b98d9.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 0x94c169b2bbcfa5b4d3daee380f9f7bd6a54b6f46c972b8256172f98a581b4b7e. 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/ESA012031527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba3a0bdd87e1b8a41303313537eca2e9428540b6aa226df50242e1461b91e2b. 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/ESA012031528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f232e40988874481b89d23ab328339f34f6064adda2d6f33c4963af28c388. 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/ESA012031529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dfdc7cd0532b7d0054113024edae7f86a2a599fa03c482c7f867d5e902c28d. 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/ESA012031530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215150afec54fd19ee635001ba3938806fd256ec069b01834ab7f6a080e8857. 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/ESA012031531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ca0fadae1c3abb730bad3c56e4483037a8ab1b581fc4f69229c97b7dd4223. 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/ESA012031532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d3274789a5ffb9d37104d5657e8059794eb3ba23a9291b6f94f512a5470a2. 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/ESA012031533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f00fd48071148afe95d8c6cc3bdaf5ebfb22b53a0ff5fdf2fabbcc65a01cfd6. 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/ESA012031539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaac8dfb984ce293b5697c18f197b18ac0dfdd3a2c57663ad6c714a392c37470. 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/ESA011841596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7350b2e594d8027a1114414189a555c2fe1be9c19641f8dbc4105304d055b9. 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/ESA011843101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fa7e3ee58d444926c3455e07c16652447a40dca4bd6dd5b3885b2b5a235b9f. 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/USUG12003063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43de934794a4102cb5cb1ab2eb9a42e23d5f41bda8481d36441d14393fec9add. 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/USUG12003060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1ae66d3aa06283143b8a7192930bb20d43ffb3607ac5506e2a9ff8c1f881e. 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/USUG12003071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb992947b0b98818c66e25e5c5631cbb02cc90759ad7fad3d7218ab9404aa00b9. 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/USUG12003048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022db2117a76294911bf0b806c439ecad87f718d122bad290467ef9c85dfd12f. 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/USUG12003049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc90790ed5113af55e30b949197d4316cfd763e17884f109a0f71e4efa559408. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUG12003050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936503d2f2981ddb36dcfe139ce8ef014358f0b048aeac986819b734a3b73904. 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/USUG12003054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17217829502790660875a2ea886bbef89921c0d29de972f61c787a6f2b83aa34. 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/USUG12003059.
Clasicos Pa' Tomar Chorrito (Sirvalo, Sirvalo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26918e45b340ba68a7ba20db08649ea435045c247c2ab592216e1c8a2a86375. 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/TCAHD2312744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a01f30e1c8599673746ca941041172793bcfad949ff865dc35a2be5a062f3a. 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/ESA011572073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08962da41ce8914a796cc0a1dbc81b3f31faa5a5ce86b4a829bece2ea7ebd892. 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/COAF42290166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826da9440fdd0839efafe2770db17492fa17efa400210e57a63a50312a5d4e06. 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/QZG2X2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0cc615d979bbd3e63efcb649b3f97feccb3b5e8ba999bd6bfab770497b2d71. 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/ESA011580392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57894873f9a0442a92ec22e3dafb7d780eadea7d93a0cc0812991b5c0b6789cc. 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/ESA011680849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5900323620cafc824bef58ce3692bdecd0459e07a3a8870699c0b6f1c846548a. 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/ESA012141639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf0f07f367fa7b487765b811d91f7b1ea326cc137350ddbcfa47b1bbd0b400b. 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/DGA062468237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3a32dbc21391ff545092ed567c76ab1d3ff716aac5dec5b2e3652a690138f0. 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/QZW9K2466789.