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 0xe1c96dfe57bc11fbce6e666dbfd968cf3d4759d59d9cbe9d22aebb48d6085205. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fccbd096-4e30-45f4-a994-1246827008f2.json and https://artists.proofprofile.net/proofs/artist/fccbd096-4e30-45f4-a994-1246827008f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fado de Coimbra: Dos Clássicos aos Contemporâneos
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 0x03c3557e3d983b0fc4fca0fdcf399de784e6a06613e248cb54d1126c8d134e0f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRI9C1900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e014670fdf29b8be47d5fc59c0d7923af22fb9e9435054ca9370f1b271ea2. 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/BRI9C1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991574f166171474ea2be5f25603ad874b42e4fecbf29801992d932321543539. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dcd620a885b331a922947acd4f21a4c92768a34e816240e02961dcc2041224. 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/BRI9C1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cf03f136359959da86f044bfeb6d369b036eb656f017c39949c352add50da3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b218905fd01f3c23aa66194e6556e7b2ff4915b4802b64884b44613fbfd09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d2b91a3825b17dcd339f4a057a7260544772bbe0e656064396482ce2fb482. 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/BRI9C1900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7e8d78f66e2648bf6f73261b201427c50e5e0c6a01035e031914e182ed120b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRI9C1900096.
Balada de Despedida do VI Anos Médico de 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7404ecaa71d5cd0a8162c7361bf3bd2426e392b4c4b5b6b7c08384d252f4d6a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25dc9c2d8e0a30a0003f1193235631f68b31ed2e6c234ebf53c8dbd30b1efeb. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BRI9C1900098.
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 0x79f24709a1489831dc6bbc07cba962967cbf20f9454d34d9bdf80c9ea20c40de. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRI9C1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a03e0eef76c0662d0387d543c67bcae75072d1aa6de293ff7747139466fa3c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b9ecd20233c3a5000d6451ac5ec884e4057986ffc9f590030c7f618639709e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8c2a613934dd18677551edbcff922cf907ef6c378ceb16ee0bf8d3a4dc336. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7ee07a088d571a75761a860233c9ee7425dbd42fc5200f5b691ab72f355df1. 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/BRI9C1800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe92a748abb9f00e5f4240039f8bb657d4e02d392c6b446919223a024bd6e3a. 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/BRI9C1800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd52afbed3a0e90ff3580923c56c5751b1a47fd9a5d24bb8dd713010dccf38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRI9C1800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ab146b3387a997085839542bf4b455a7cde560b2418f4c7ee31a7d6e6bd79. 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/BRI9C1800187.