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 0x42c6ed12bc4267faf8d4016e71bed3892ce19d2a8ba2cc04eb7875ecfdca0f7d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61aa1c76-d426-48ff-b486-1d107278615c.json and https://artists.proofprofile.net/proofs/artist/61aa1c76-d426-48ff-b486-1d107278615c.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 0x8a880a9e2a85df11e4940e123bf3cda7cb06b3d59f09003370b7881079a4d89c. 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/FRY510779242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9015d2c60a55a7fa03a67afa2ff2d9f044dadb2935cdf5f145b59bd26111efa6. 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/FRY510779252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be1d70fa1dd29a0c7e4891b423a20f13ce5fd0c68f8f9b802880f87c4063a8. 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/FRY510779255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72061994451a1d4083f991ac93d84d949053a79e98916744369cb22977069452. 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/FRY510779258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3636b850089cab6e46552cd263112cc30444327bc3e0ef0146019b2aafcf4630. 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/FRY510779260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14740a58742f4efd4640fc808776abb7f4dc938f326025d1f148aabf5c2b163. 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/FRY510779261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f4eee1862ce3fa93f7713f754da7be94f85756121d145ab8798c62158d9332. 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/FRY510779262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14e4ec678133df293d26675c9bf5c15d86c0651af49bab17d2c0a03189c57bc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRY510779266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a38dea1d0ac5c4f7ca8ef6ad229adb1d89f16861f9a670d46f6c340c10a2b6. 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/FRY510779267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2482dcda890503dbf335b44031f8dbfed442577803353cef8cbd421c95016a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRY510779268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6074f6e9a3cc9573f0f01ffd45b1c1beafbfac715175e3abaf8212e4e2fed964. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRY510779271.
Vous Les Copains, Je Ne Vous Oublierai Jamais
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef332d6419f08ab31e9279b17fc21efdac9759316de22a85228c34b2340127b2. 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/FRY510779272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef09b4c778752eac75949e727e03cbdc338b9a39a1aa5574963c697597babb3c. 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/FRY510779273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aac2a976aa1d52e0178d23f614b2c92e420e3047a96129187c60c7751be87d. 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/FRY510779274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4570b5573e99efa253c0d3c1ffa05c421e261c9e141fc505c73a9d5d0546662e. 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/FRY510779276.