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 0x4dda9a05101bbc70e340de756f191e5a5d972ce696ebb71adb02395a96b10dae. 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/f4095b76-d496-4245-bb55-cbc6f4f24a60.json and https://artists.proofprofile.net/proofs/artist/f4095b76-d496-4245-bb55-cbc6f4f24a60.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 0x0965275a8d25826522e2ba5cee3aebd105573d37700a8338db8165a31a49835b. 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/USCGH1393381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a05203d8bd5142a206ec9d490adddbcf2a0afa96cef6f60308aa0bc5c9b36. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USCGH1393382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888ad778b4b81756514b06028f7838237b3591e716fe38b46f1ec8f4413e423. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USCGH1393384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b2a9030da45e4424c286977e0019d52fcb0b09e911be2f5301712ae8649b3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:22:15Z), 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/USCGH1393386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f2bdb3eee764728894363403f55d09db42b054ba811117a3ebb4fc90b1c6f1. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USCGH1393387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebc95c6b3252a2187f3a57699f0af839f2d1b0276ff2e9dd9f7ea48a57b92b4. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USDY41619000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b402d29693151322a9d75bd98fa405062c6da01ea0f1e7c6151b14733138fb3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USDY41619001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599091caaf2783943a0e42804a5abe7e62f879c2119733fe00a5df0c09adef4f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY41619002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2005757fee42c248ce1287a4d99c80f9b40384f7175b06fb5eb9f7462b60441. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDY41619003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a50f918177e54b38d89502d9cdb23c4ff1df2c09fde1a6156d346505e58bf70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY41619004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc247353f23aeb36d43c10c32f883af049c3223959596234b6eb5128ccd2ff9. 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/USDY41619005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e931fec020c53de730c473c2d085529a31cd05581b0ead82e2b3d8519b8aa6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7281874004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57de632bd3b753385eb896d6a55b655514caad73bfd6aa71bdd67692fcd1680. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM7281874005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b89944cf9731c15f94fd3bc74323650d277f9c12df858571bfd2ee53d0b008. 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/QM7281874008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8281e24d27adc608a9069652992032e948a81be2dba952a0906e282d6dec936. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6N22234785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b41c637533267d4751894b1210b31e25c3cccca9b6446d0d0ad4800d0a9b4c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6N22234786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c6589a69745734d7df4bc210fdde9853fab538a46fe9a72978c87f069c840. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:08:11Z), 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/QM6N22234788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163b0ecde591970d860e5af3d6dca7215a72e1bcdccc870553ad7f027dae0a1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:26:29Z), 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/QM6N22234789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d58027e2a47e914dab05c60dd374964bbdfd17ed748128be80d49a762bc36c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM6N22234790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf910ae2d616e2378ce7d2bacf6fa954f897df9525e3ca0222553d3bcbfa390f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6N22234791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf8729d0df03c1d9351736c1e0133f29df536656a5d1c56bd386d90a7f2f569. 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/QM6N22234793.