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 0x41a022756ae959b18297dfa7627d7cd576794806e690dcd55713a603c32d5130. 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/2e24ee7c-1aab-43c5-a884-2c7b07ce0a96.json and https://artists.proofprofile.net/proofs/artist/2e24ee7c-1aab-43c5-a884-2c7b07ce0a96.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 0x15a99747d891bb4eb3c6872518f76e7b789bc389a434e83aa2797a964d7857ef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA71353110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd2d08214eeb225f5824e3dee8cca20f70f28849155395ee7488a2a177b41ad. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QMDA71353111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0f59b3798fc869a1b905ad8edffd337a252ea1bb62a3e8944f210afc1990f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA71353112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bef2c974dcda1a3cb4835c2faf87495b03dad4f43d1fd9f6bb7fcb11325e18. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USZUP1010906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab6dafe43cc32bf5fe033120ed603cb561c1b21fb8e6550689b9bdc8bf059d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USZUP1010908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5bfca66fa394a951201352dde0ab462a31c9706323e9bec2052f95332e280. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USZUP1010909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa772319f6335603880134d09f04f7fd04ff9f8fc629af9715f1d88304c1411. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USZUP1010255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e0ee065c59c36331e51a9d2c9582917232830d9747d6b804eab230a62a10ad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USZUP1010260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bfec2e86ab745f766289a8d3878fe6c64bcdef35f49585299a38f248fc950a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USZUP1010261.
Popurrí Chotises: El Bam Bam / Una Mosca Parada en la Pared / El Tamatan
Popurrí Navideño: Fria Navidad / Navidad Sin Ti / Navidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2595fb11afc13b1b022f4a428527a77c546cf821a7a31cdd8107f54085dd1365. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMDA72445030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9c51aea8b0675b945d2b90d41f6c8efe8736662af17bf3f209ca376b2dca3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TW2535306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c3519f0cfe91b7af3c5e0ac9f6f39736e4e198b191b992bc2399d566c7bfbc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USZUP1201065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf543502d4d247bc5eaf4210e8f044f50149e971e6aeab1ff684d9ba924792f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USZUP1201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83200cd7400a88c55dae69dbeeb513363c5cbaee0a3e6d3acc675b44e95d7c18. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USZUP1201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65226ddbbf7cd5a125a4273c89b620ac14db4e3273152917b6b3398968836601. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USZUP1201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8ba3e028a965797f8e6ffcf90e65d8730b3cb24f22efd2c2f3fd2d7d6dc946. 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/USZUP1201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b3b48840452e300fe1fe967dbc7beaacb74419f6899e59be16708cdd1ded6f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USZUP1201075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a2b3803a1f720ce7cdd59a8273cdfd0917b86975664b892ac0ff0476780bc3. 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/USZUP1201077.