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 0x92031ca0a1f25c0425636a045330f8c4feaafa7c93ae557b1ed34c493209b6f7. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c3c9fe7-e5a6-4c0e-92cb-0409ba08a660.json and https://artists.proofprofile.net/proofs/artist/6c3c9fe7-e5a6-4c0e-92cb-0409ba08a660.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 0x90049ca49239acb95ae796dba9f80a33547ae09baf827ba48dedc47114f22311. 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/BRA3E1700001.
Panorama do Choro Paulistano Contemporâneo, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c06c741feaf15c770a6ce55f49227fcba2904d4457c3458efefca5767c31dd. 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/BRPOU1400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eca289be4b87aec86690427f026c01157ad1bbe61cfd6c823b7c55309614cc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRPOU1400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359168de2dac6a88b3543cbad313f41814d1d781d83836ac74353dd769131e0. 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/BRPOU1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283e2a911870692c3d033bdcbf7c00b57695a8e95fe651c51b37c7abf687ba0b. 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/BRTRB1634385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677bb26ec4ca5ed76257a987b163d31c0e57d87adc6ce88ac9594c27e5501d98. 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/BRTRB1634373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8719fd8665f4d0a41160f5c2d1f09fee5aea3f3fd110e0d18dca1a048d554871. 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/BRTRB1634374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646af633708800ed737d27a516e6172fb3fc13811136ce5a694fa92c0cd7d16f. 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/BRTRB1634375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf99eb4a23c2a67432db6164bb1b684c78702bfc333d99d4dcf0028887d4cbc. 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/BRTRB1634379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662280f22e1196ddc904e370d7e768528900b7c23d04fa40c009948e9cafe098. 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/BRTAC0400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ca5331c5bd1c646fba725f4197565d7456494970d8595add07ded568757eea. 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/BRTRB2016994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97413fdcdf21c0ce9436f7543793f367ac19857b2df64bbe10fb76ae9835ce60. 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/BRDEP2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1be41186515c0c6ee97e9f1b97b5e656c0b4ddacf582e8fd007476809fd285. 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/BRDEP2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e5443fb21b2d07a127e0781a44822ffcb930fd46e2610d02574cfe2018c872. 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/BRDEP2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112afbcb27f524e95cefba3541bda1f741e19723ff29ed75b40c979a67070fa. 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/BRDEP2500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27f7def2e3a70376401d8a58d77f5b32af5f85292dacc6e1b9fd1c0345a84f4. 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/BRDEP2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3270201ab072602e2ab9c21214f98bd38176e474174ee39c978539e867ae1cb9. 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/BRDEP2500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e9c39eb07882f84d08246c97fdfe2acf20acf129a40d8081082408c7d48f6. 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/BRDEP2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3102e3373e28a38e610b12ac7fa021b2c5d6a0713396b62e4bb067ee625658. 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/BRDEP2500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee6e3cfa2960636aa4c9168ff478dd24760370491aab51745a06c38935e4966. 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/BRDEP2500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6116c740cee1a52482f42b9a83fc93b5929801584002309ba708c281fd80e9. 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/BRDEP2500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1515809a2b3d99d6906d374fb4d75deb6aca98974f912bcb65d0e29a8f642e. 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/BRDEP2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2efc139077b1ba3a8e3587ce1a7f16c6f36fb1f91c95eab84d1abf36a193553. 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/BRDEP2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65e896b784056a12e0ce77d69c70ee4fbd545aaaf03a893c40bf03041e0e850. 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/BRDEP2500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a120f284e36c301377f84e5c4977200afac59a00be807c648f8b291fad43b. 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/BRDEP2500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d59776d19fe075f9586289153137cdd40804eaaf1596490f572d091697d9bcf. 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/BRDEP2500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a789fd094018e3f2f0a23658f8b5040b54b5d52752e5026324bd5280789b9f. 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/BRDEP2500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc251a56420ff626074355ca9c51da8e18e2f67d71e4bb5209449fdd9cc72b59c. 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/BRDEP2500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be6033398f5b11f5edb436c70bbb761098ef7de7da7a7e424e0705d824ae46. 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/BCJNI2000005.