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 0x9e630222639760a735fa4cf54d5b31839da33e6e36359616afbb7a8e618da44c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e479b9e9-de3d-47fa-bdbd-274f4632be0d.json and https://artists.proofprofile.net/proofs/artist/e479b9e9-de3d-47fa-bdbd-274f4632be0d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f009127db6b94cc7c8ca7892ba13c0218531a089da72917a3bad8d0eb705245. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ESA011905048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8478f1585a1916d62b26dc766108cb25db82b949a9fdeb8876c51ccb1decd81. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA011905051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9552425734a82be7802e8f38db3450834117c3aa668d832538d1d59b9b40826. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:08Z), 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/ESA011905052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39537a3cf2890e55bfad0248c1c145fa68dcb8cc38082cd6c176cda6577170da. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ESA011907256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705a053731832c01a8d33e2d7055c4ecfadecd722132af580b2562216b7d4b3e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ESA011907257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649f3e3c7c68d9466e01a79fc405838a27e886f62b4721f30cfc15243fb9a700. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA011907258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619aba79cf74ed20b24102435e0053ad6320d50be7f08f57bcd5c799fa469d2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:49:45Z), 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/ESA011907259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5320fbd14016e116b3fbd5a60a78d5240d62e019e39b3c0c11b1c788375ff. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ESA011907260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1262841427a09bdab898631ff566efdf7ca8e670c1a8272db4bc7dbcbe9e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA011907261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7fb55ad65c7263e4be45efe946711e137a74ba3ded983e23de68fe64a20bc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ESA011904195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ae08787a86a049d5803532304357c3d5ab5ec1508d3a7ac4280bf258a617c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ESA092232788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747c44d26419aef1c7b84ba7ef466a37c9bc00fc684a67e97f1439171897ddbd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA092232790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ea53a8ae583ff377a0383ac01c07289bc61cc9ee5f0a0be4f3bb1445ccaa9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA092511019.