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 0x149327beece26b8c77552698c19c326c38e214c1bb112beb1f752959b4ce8110. 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/926777d7-73f6-4da7-bcc5-7bfe65bd8d80.json and https://artists.proofprofile.net/proofs/artist/926777d7-73f6-4da7-bcc5-7bfe65bd8d80.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 0xf744aa97a0f9039d37fea0a235fe1d2fc0588b11864d530440c61ce9fad6fb9f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:39:00Z), 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/JPW792005044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e6f3ae6b9f7cb8486e5eb49f63635309667284779a915077ef176cc18cf47. 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/JPW792003670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b4d0962e7402599fee4546a8e2624b41bceda36604a9b25961568d4c9bc392. 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/JPW792003430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d8cad66e8a29749cf7bea041df4f7c6b8b85df15c8f23a6658b8ccff032a8. 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/JPW792416814.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a4316cd1bee79437def5b84fe45235c3a617e474ed89ac26fc0bf655ad70a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPW792003400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986ed82692ecc8737919108d25de073a3a5f93123aeb45e52be78475b74c2514. 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/JPW792003380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dac2c231dee8d8be32436e85252b44a7dc729fb96050631d24e08f1fbb025a. 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/JPW792003407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c78ff5f913e3d49e0d3a58000c5b1f468aa544cee982da401885cac76c115. 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/JPW792003406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e6f3ae6b9f7cb8486e5eb49f63635309667284779a915077ef176cc18cf47. 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/JPW792003670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c188f93d972ff563ab3beb4fee4ec10dc379d45e1679c7bc99398d017fc33d1. 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/JPW792003404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67948116d476e2ba8a7d229aca7ba4226f6b57e9f2aa8e7e0fe15be664c9d9. 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/JPW792003409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242a6e873879c11fc50097e602476e19788e029e944913213279fc8fff206b59. 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/JPW792003376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3559f248b7aedd50eae5ac3766e2b10c18b2104c1b67a0f2437ad764e3f534a8. 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/JPW792003374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ce20f29df5268002ef0643aa4b5e1b6c379440b1fd38490bd4b3595d8b1f2. 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/JPW792003673.