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 0x0edc8c9fe117976692b9bced222627d377ddf72cba66a1affc85f6097a85e255. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2783f985-8476-4215-b6d3-cb528019497e.json and https://artists.proofprofile.net/proofs/artist/2783f985-8476-4215-b6d3-cb528019497e.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 0x57448a3af89d179ade8840e723d0ef3407d783a4bba775376b6484aa85902ee6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:57Z), 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/TR4591303118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33455b44fc9a541fc56968c5da9a93e1500aab698e65512aa210b68a80078b5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TR4591303121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea11f343b78b7c442d23c48ee6f76c006cdcd78e603fbe083d1fade384344b7. 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/TR4591303117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5efecfe7118653513e45aeb5881d45b18fbb4285b802a6ccec5c47afdf04688. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:34Z), 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/TR2811600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf77a156c5e502cb06d9731b20dbbe94867c88975982f23a680a1c120a00550e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TR2811600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042ccd4bb889b8c93a5a3839d0c6854cca7af8e3f526707994983d8c5360fcb. 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/TR2811600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba377581ab50d667f11a86846198bffa03abe47cd740a87baa342c91482f514f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:38Z), 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/TR2811600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5efecfe7118653513e45aeb5881d45b18fbb4285b802a6ccec5c47afdf04688. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/TR2811600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf77a156c5e502cb06d9731b20dbbe94867c88975982f23a680a1c120a00550e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TR2811600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd042ccd4bb889b8c93a5a3839d0c6854cca7af8e3f526707994983d8c5360fcb. 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/TR2811600108.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d1c6ff470c44af546b437b65726d954599a17fce253490703a618e5d04bd3. 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/TR2811600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360fd8bc60becf27061f7c6220e6feca621015dddcb95999c8920a4fff3530a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TR0331501689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08ad1f39bc05f9fefb2f21dcd94102f84d6d8b54f20ad6a6933a895b13d8460. 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/TR0331510007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673e23a4af500a0bdc262e6b0e1645b941a48b376702add602b627fbaafdfd1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0331811407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7210cfcfdf226935bc4c35ae4d57ddceb19cedf4bf0905924bdf3c628fe9435b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR0331401131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84825538ebbfa2bdd170e6154188888524c19d563485599ecca709707b08c066. 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/TR0331610807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532b1adc7c2792f25d04aa587034c6dea33b13096b22a327f00624a716fafe44. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TR0331610745.
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 0xccf1bdbc9145369ec37e12891216eefe6093df7711f097e41ce62a0ed7392223. 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/TR0331610753.