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 0x4d431bd1659b90732d51e3aa0917c839c2cb2b76f265e9c3bbcc1dc01f90fe72. 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/d6b0c3e8-d212-428e-ae4d-57edb0d0fd87.json and https://artists.proofprofile.net/proofs/artist/d6b0c3e8-d212-428e-ae4d-57edb0d0fd87.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 0x8654af786887391c5e3ab8a79428e4bc1d397d2762ba1d928ffee0a621b80e72. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR63R0301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d94bcbe1a71c6c98a83c0e002084b17536293b4ca9318697db796472440fb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR63R0301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc148e35abfefb72dabb9c406516f617b43e65f85f51d087bd67a9b7dafa97e2. 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/FR63R0301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d4c12e945917560e9c7e31413a3830d0b7f7d28b0b1d50308db9b0579e8b62. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:42:30Z), 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/FR63R0301025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe883f53d9655dd1828c2c219edf8becedfb538586320a3dea86eac27df295a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR63R0501145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c5a73523d5cb6575bdd2edb58d0d6d62863a807feee88c92630cbc64babd07. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:22Z), 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/FR63R0501147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bb51bd7d0d67833552e61d27208d4cb73c08dc9e340d2a856d88ea4c90c8e7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR63R0501149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9662a92ef37d2d8f44056d2e0571f9aef9ea2ef0940e1dd0b6363e7ec4f794. 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/FR63R0301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9662a92ef37d2d8f44056d2e0571f9aef9ea2ef0940e1dd0b6363e7ec4f794. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR63R0301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561c3d12d1d857eb4b39959fd11bd6a63a84eca0e1770f56f97962dd2047e9c1. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FR63R1300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3237abeb78158807a33b8475063681824db39920952ea1cabf5d8cacb87e8a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR63R0801331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b96a5684eadf1f21453d6cf44993f479a67d4c9503d6edf14a67ad97a7e4d2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR63R1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd06aa708dcfe4777afbab779472ed00ff119169a896faa909fb03e318a748f. 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/FR63R0801337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04e8b09dc07cd789c447bf12d4739f80ecacfcf8faeaaf634408d754e4cb8ff. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR63R1700026.