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 0xe93ff32024a78359cff373f20bbe6f86d88c084106062ea663645b73fdcbe931. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09011375-4ba2-4ae8-b50e-878dec8c47a3.json and https://artists.proofprofile.net/proofs/artist/09011375-4ba2-4ae8-b50e-878dec8c47a3.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 0x8031f929edb47402cdff38f22741bc5fd82f16c9b629630b571d43c08165f5bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1728193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631dde153e4325694ca41a71541fc0a660f1516b6f57f93ab9809b850231fbd3. 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/US7VG1728194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b7b06f298d6741a52c8ef651142b6018e2aa4b87fa939770926155aeb33770. 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/US7VG1728195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814ab349af3a93bd8e52006bce1f9ee3d1f6406d289e8572c586e1d6a9bb7da7. 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/US7VG1728196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424705fb15c8adb59f5aebcdf49bc791e9c12f33df06897273f0a4f40307f5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1728197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d4ac9acd49709cc02a05f474f39acaa7577d85114d82e8cee3d8b0cdd3d54. 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/US7VG1728198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb7b7926df9e76f3dcd775aa5fd81da82362ed15937c431ab8f9a73835216a. 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/US7VG1728199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650aa05e7144f09618593b167d2cfc30167ed1fb9b2ef5787a006e1c9f28a03. 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/US7VG1728200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823a594be4330911214b52c922daa33b95e7564beea9b83df40ec787b0ebe50. 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/US7VG1728201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5810e3156b4ee2f129c52e47cb61b750fd25295dda10d98f4b247098c9f93e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US7VG1728202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6b8e342b1d3083320bd1b1b4353500e0621df5887a148b91306190e415dd50. 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/BC7Z32200001.
O Plantae Convida, Gustavo Musa: Nada É em Vão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53abdea0de85ae7c88e074f025ce47fd9ad88b8f2a74eec2df50f10ee7c1d348. 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/US7VG1856335.
O Plantae Convida, Bru Stone: Mais Perto do Céu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bc930f5b4dbd951905c093da572b2c9e2ac17b07bd7c1fa76188918a968b94. 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/QZ5AB1986065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc245c46e4288ac966a9bd49557b5cbc1190183b475a327db111bc977045b20. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US7VG1740637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d7f360c576cc510c759ff56ef892a8c584285d46cab192f15ce08b60572a29. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZGLS1943001.