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 0x0aafb5c468b193bca6ca31f39181ed48b2a4f777e293c41015691277aa2d6075. 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/04dce4c3-bd74-4294-a5fa-5f0dbd51d3ac.json and https://artists.proofprofile.net/proofs/artist/04dce4c3-bd74-4294-a5fa-5f0dbd51d3ac.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 0x334c68dfc0b0f9af77753d935871f655c321227bc203d5b4f881df675ef8f821. 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/BRPOU2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570b9c7232bd456164cb39602d0cc35eb31b1ffc918e59dfc6901af73df700a8. 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/BRPOU2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8052fe281b655f256357b34d939f7cae2c956c5c1bddd157e3b9c7442d465. 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/BRPOU2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06b98b0c4c1e9eb0ad5a14912150c9f9f97dbba8f9f8d4c727b73f8afd0459a. 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/BRPOU2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334c68dfc0b0f9af77753d935871f655c321227bc203d5b4f881df675ef8f821. 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/BRPOU2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc285054b350ef77ccde2b1cbd9ac2cbd1b34da4f3ca58add9331aeb16b9609. 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/BRKAK2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bce8a7e2f40d398f6489a876349a9edabca60bb538f0abc3d3920a063d75146. 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/BRFIN1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0f1684ca028f74170f38ae30ca0ac2159e5f43d6443f72af340f380a9a8bb1. 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/BRPOU2400032.
O Sobrado de Mamãe é Debaixo D'água (Trecho da poesia Osun Hum Hum Hum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d091eb896f8490a6e348052cc4a57885207d4e6b7a6cb1896bb06ef40f3ba0. 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/BRPOU2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d1039ea8d1c578f1c067fc0b413a4707c0d7b45b92710362f3fbc2c834f5f2. 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/BRPOU2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae801d3fca045d0a5f7c39dc77a666fbbe8e1598bc4edb6926c406130a9ff4. 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/BRPOU2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd2e7413b53b49c8508f2a2b6ee29d6801986db93ce7d63a52888ced9bcfa3. 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/BRPOU2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3820b12192144713086127d3e54098751857c1f4c78f098e123ce347ce4b6d5. 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/BRPOU2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2bde91dc87eabb7aecec6b27dd6b7ebf899afcacf29f3e6ec47659a8469887. 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/BXJNH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67a736a2490576aea8784ef6190fbf7b0194651884e6fc918e3b286b9aefb68. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BXJNH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f794c2fb62b5d5ad5358d0a25ef502c46047322d0273ffda570f3df855022d. 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/BXJNH2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00119d3760cecd7d2209755c64b8367a52d75f50951736abdd3a727e0bab2b80. 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/BXJNH2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88501be17d7770264c0474762172501fed037b0a98f954e770d8f13bb732f77. 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/BXJNH2400008.