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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cc6d481fb4185a4609b0eca5cfab1cfd0482f4c10b828ef5b8b92e95066774. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35fb26b8-da75-47d3-940b-9657a7017e33.json and https://artists.proofprofile.net/proofs/artist/35fb26b8-da75-47d3-940b-9657a7017e33.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e6695b18985594578ed98ad3aa59792d9e69e3a41efe142991def7208bd85d. 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/QZGLS2108801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4ed431e621ea6188bed42a1c82831252fac28269a584733f3f8a02b507a1c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLS2108802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78377450947d7697f0d421f900cd7b3168e22a5404273b310bcb8a295233e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2108808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701e79a19fd573c7bb90e9abc5ca51c389df3545daaae8cf7bb02f413c13355d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZGLS2108809.
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 0x8971857ba1954f7e8f011fdded61da67fcd800721275c8b0a5e5f64fd46b342e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZHZ42191698.
Hino Ccb 421, Recorda, por Fé, Minha Alma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf041b19aad05114b7652f41dc7f4098e7241a75a2c0aa358abb51ee0e7fdf26e. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZHZ42191700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fd90bf126d8d020e2f064175b23936719deae7df794336a26ffff29bcf0128. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ42191706.
Hino Ccb 427, Os Que no Senhor Dormiram (Funeral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a99e603e80486065052e1fb053b26192ae5a47dfbe097c54438262fbcfd967. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ42191708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe6fc01a20ac64b8ec82fdf6394e83dfe0282a27dff68a7e4263cdb070905f4. 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/QZ5AB2178885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d2ef3060b4e0b359286171f2e5a72d2470e324c9cf5d418ac3dc9f666ccce2. 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/QZ5AB2178887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511e163737b23e6d5fb74f7abf16b6e3015b3cb294f72343de9ee604ed6b2367. 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/QZ5AB2178891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dac681262b4b2b793cf14c3d3dff9a5c750f88a46bf4e70ce92220c3366499. 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/QZ5AB2178892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd105af13b8fffeb3cd36c27142494e7c3b45cbf2a3eea13e8db0ed2a09628e56. 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/QZ5AB2178897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d57f8be6e3be6886e73471af04ebe6bd08557221d744f458e21a2305a8342fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2178899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e79726216d75b2f78ac5a3c1722eccf4c84c48d72e24eae8d2590dade0eadac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5AB2178900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aec5b017bf0a958f947ddd734d0682008cb7a075a34bc06598ee343b3f6149. 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/QZHZ51929432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe768617505dbb6f855333b1513e669c902248615a29bf0a86dc4ebb6ae540bad. 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/QZHZ51929440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56b0c236303ec46968978da02ec2827377a603f1e651177d229728e9337c5f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB2417371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2818b3f07f4f1a2e4d2dedf4eda102112e2e00a1f51f8692821e2882ef03f35. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5AB2417373.
Hino 10 - Prossegui Vitoriosos em Cristo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaca0c2737ee784195d0f9b3cb9e48f2b9c442711753a3b0cbc11530c72e66b. 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/QZNJX2049337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d53d016960cbf5193894d5034e7744e998639eb6b338703e34f742192756e52. 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/QZNJX2049338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d85ca4cc6a74e3a5df15affa4f076b6c09678cb243ad3cca710110960f6a873. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNJX2470698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b82822b3a3e317003e31b3a59d5f886954650ef66002a7c3df2abe10792e32. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB2178888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c5170130caebb136dbed63eaf2108c00b97ea047427f41780089b797334fd2. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZ5AB2178903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68788b4748fa3dbfd0b05dd441b8b8eec002f83cda8711aedc235c58dac2dae. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZ5AB2417372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b19bb22034f1981aaa558bd1f356071bb09bdb42a6ca795e5cf5d8270e44d2c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5AB2417376.