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 0xb6dc9a5be4ba7a44170de49843aeb6792ae4edc542d6af129cbf7611fcb63e6a. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b845ecd8-4699-456c-b197-d6b0ac686c46.json and https://artists.proofprofile.net/proofs/artist/b845ecd8-4699-456c-b197-d6b0ac686c46.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 0x8b94e062a7e315d16cd8c545a525d391a7e62497a23bfcc5c71f321dda0557ca. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BE8GB2305006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a65b570176ebd8af6aa30113944ee21d7135aa195d59f93d30a48b4ee77324. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ITK2X1800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d13b4686d65cddac0e282447acf0309685dce38eecb8594498baeba7c829a6d. 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/ITK2X2500494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b24e3db3c4382cfadadb30ab44e3da272cff38c6be42c568e7b088688f2930a. 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/ITK2X2500496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67e92556366b00989a9da813a58d52ecdb57a1df8522356038f9be041def6f. 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/ITK2X2500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e37e672c24127fddc526402079f2373372c96a042dded99931989567c95d05. 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/ITK2X2500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44461a156418a7f6879e38a3847f7b420619ac3e03c72a0414f4c9730033633. 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/ITK2X2500499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe567a3afbf2ad2d46190f0e22d6ea2046d3503160848aea56b206abb1d332a. 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/ITK2X2500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a16597343f7c9c76d0d1349e4b44c837d5cc5bd1af6bca57c4e1a225239f96. 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/ITK2X2500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8e6a6bd1a1da850082477a19052fa2525c9a4a6242f79ebbed74e9eb2b305. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITK2X2500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929359eef9268b3b0d4e6c4e32c7f994f57da14edd06b902aeb01aadbe5798cf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITK2X1800116.
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 0x7cb72dc4316ae8f6329ab42364449c526fc4a4f60492af03cc0e6d4270c13aa9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ITK2X1800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bb15d3ca3e18e0a2a435c3b04fa60b54670009ce6eb4d03afbbfeceafc38a8. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ITK2X1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985bdcc05aefa6d6d8e9ff7566867181030b05fab8b2abe9a889d09e1073d34. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITK2X1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70ee46916fa32a5806457945c4ae5e25fc14de3ce940f5d9cf6e1fc5d24eea2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITK2X1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87532d40a1fef7cbdda1a56e51ef81d6fbc031a2bc666552605805caf6ba668b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITK2X1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643ab13a16ff18daf5c349f0cc9bbeb9aa99668e8baf3d9877cb046a64b3a4a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITK2X1800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8152893ec848c93e6c4983a23dd7a15d0683485537eaa6f8cfa5b42fb2c449d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ITK2X2500495.