thumb|right|325px|Restinga habitat, São Paulo state Restingas () are a distinct type of coastal tropical and subtropical moist broadleaf forest in eastern Brazil.Restinga.net They form on sandy, acidi
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 0xf901f759085c9fee16cf1c82997642c82d347ed7b0ced2be8794a29d4cc7ee8b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30cb0946-d17d-4d09-9535-6f206a30eb81.json and https://artists.proofprofile.net/proofs/artist/30cb0946-d17d-4d09-9535-6f206a30eb81.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 0x0d30fb389eb9bc2228b8733af4cb4abdc49b38d45f250cb7146bf05c4d7cc7d4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ES71G2317296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a93dd2b21a3e76186fe0e25c09a1c31d95cce28d2757bdc57ad1ef5534101. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES71G2317297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d30fb389eb9bc2228b8733af4cb4abdc49b38d45f250cb7146bf05c4d7cc7d4. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ES71G2317296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5a93dd2b21a3e76186fe0e25c09a1c31d95cce28d2757bdc57ad1ef5534101. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G2317297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e97c137f87b3eb9cc91f7a81d0e7f6e724bce4d697ff0ea5fe5b1c7bd943fa. 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/ES71G2339185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72c3148b2a62170ad3fa2c5b5a70d93f36b2e9747c3dee4ce366b51e56c9536. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G2415271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f30dc42268773aaae063ec936315744ea867abddada6c7399d9b5091921cbc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N22589635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf79ff016b87c28ada10dc1acc1bdf1444576bffe69b8a543c775ca47a4b248. 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/QM6P42566684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f898c88815ae4d3179908acfe6dfed314383490c476692414684d80536e8f8f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES71G2508992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f30dc42268773aaae063ec936315744ea867abddada6c7399d9b5091921cbc. 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/QM6N22589635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c5e2e6f914c8de28f3d5456a88c5280602fdf1296dd0c22feb208d089e8a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42566741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3432d6342a754358f9f4cfaebb3175e801420606252e0f535e1b00133b1c0d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QM6P42566800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2539499278918ade794a58fd8c1a0fb005e7c5f5a82a897cbf90ba31d711bac. 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/ES71G2505183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab358e9371e1cece7402182d2d2f5637c3c6ada38f0c32a564bee4db2cdd8ac. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM6P42566817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7236c16257f3df1c920b6f72d76dc7845834cfdef6b0f564aee213b32c06e6d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM6P42566818.