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 0xc1f6001edc6fd6d5f5bcdf3c5fae6924b86216b37d0f103158f777704acf25ce. 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/56cf31b0-2b25-40e0-865b-621adf84a243.json and https://artists.proofprofile.net/proofs/artist/56cf31b0-2b25-40e0-865b-621adf84a243.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 0xf357d10ad36cc325246e8acb0ffdb619ff6769dbdf44e9f42186aee8c2186fe8. 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/ESA012239877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79db6812c9d6468ee868b11763765d7d3c515d07ff54bd1f5ff45e19ea96ec. 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/TCADQ1854506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450e2afb94b6ca4932a9508eddf68d319e3484dd9280424e0d256e77cccc793. 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/TCADQ1854511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de6432952ac5f0bace873c9b7b5c818213d3893356cbd1cf1f80b84944e4a66. 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/TCADQ1854519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312e8241eec2aa302053fc4c81b9c98f33929489effabdd6f1861b351fa3647. 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/TCADQ1844745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7657035b4cad54cab8433314d5bdd3dc7e7f7759263dc7c62e8b0aea3ef75e83. 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/FR6V82617910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf23ffb123196303988c628731a8fa3629e652ea34bdee0564f6231396a306f. 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/FR6V82617911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e401dad00d94cf334e3b9a5fc0418461d36a7d5e65186b2edc57450ff09f7. 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/FR6V82617914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8236e05b3c4c92f6a35378196109c50d4dcce3ff22117a228ddb95512f0d383. 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/FR6V82617917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36aea6024e00336e1717ada563780e844977862ecbcbf2b08a63eca66a3db8. 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/FR6V82618615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c3cd401ea4db48fa02660a5ca0f69454c0f0c5452e1d29891d2f539c8f35d. 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/FR6V82618619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fca55e4aee0b287f72f167f0986c6273deef3973d635137758a96e59347e72. 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/FR6V82618622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc3dc28885f4599663121f37140acee5863a3cec879b655375d405d4ccf1e4. 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/FR2X41664300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5e8beae1b93546e7e480956acdd85c6e2fb5241fbde14b9abbbc9bf5eda36e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FR2X41654651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6f97a8649e1e8d2c012ed1e854a61896dc9b59ecdf7b9597f38063c94017d. 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/MXF390002708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe385f22606aee6be28a8520ac66a19c3ea1ee01d4a7e2cf8079356ea660f18c0. 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/QZHNB2456600.
Popurrí Pa' Loquear: Entre Perico y Perico / El Nariz Tapada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb208429738288876580c71954a257af16c707ab5ed4942529e361c783fb818. 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/ESA012275801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad2d581b8650d298caf9c6d423115cff1d7b7a66607b9367e86b9818a26e57. 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/QZK6L2587476.
Mi humilde imperio, San Juditas y Para morir nací
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9042b284bd93ba0e7abfb70191ed769b7a5a576f658533cb9347e4eed9cc31. 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/QZHN72562211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11efadecee2ff6cafbaf4d99dc49dfc92dfbb2e9817111cc67a2567b58fa0d9. 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/QZWFT2441785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641fbdbe3a82b99fdd861326ba593667111b2db041c57d8237880cfb051608a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:12Z), 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/QZWFJ2494750.