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 0x58f2d84ccab1236c7bb8b68e938d5b808bbd789d82ce77f8633ca24d51dd0ac4. 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/f0492d2c-da5e-4214-adfb-9e48ab9739f3.json and https://artists.proofprofile.net/proofs/artist/f0492d2c-da5e-4214-adfb-9e48ab9739f3.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 0xc209d7b340994a1d48c61b9209f0a0c33fee23c9ceac1ee5d4571cc4192a067b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2478909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d42b38e3513ed95dacf962a05ad23af6efcc711ba4e7e5117e26fb25883308. 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/US83Z2478912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be0bd0d8792b4fd7445d0149fc45f89daf864a0e74e17d85e945b26720fc98. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2478907.
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 0x043e10c056afa1fa8f75a3ad0ce3cc52d7a6861de1f3dc73793b63a57c04e028. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US83Z2478911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab42a6e78a32c805674c246d04753a3b7cabb203109bad852e2e02de2cce9c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2478908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b69b8ced66837ec6404ca08bdb01e460e6658aee06989057d943ac328e0efa2. 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/US83Z2478910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb1bb7ace4594cd532552ccd52f08b6a0719e676e645583b064fa243679f30. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z2478914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b060a55def5890d77fef8fb7756ceaccfbbc3c557a280ddd633cfc832582181. 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/US83Z2329830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150f344d5d7b19b6bad7406ec589bc28e12321c66e8dee235f9618caeea6868. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:04:19Z), 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/US83Z2423221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f04c16adf39ddcae2021bbec2d1b3c6dcce4c727753272160a29503b6cb01. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US83Z2423213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac631d07fca2de4c62c47f438bed95c682767fca389fd67e32d3397a83d10fc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z2423216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8985f5abfe19d805c9041a6c18cc2528d95083aa22231b9c129b6071fa348867. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US83Z2423214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d867bbd15bd1796e73baef615187cc0eed4b4c602df07c9839d73afe2af63db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2423209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36663c285e27059b15ea088876004548df48f56c3a66bff7d4bcb965e90a1bae. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US83Z2423205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3014b50cb0f4f9e8a5c766b9a1e79e7b9ccb54a9b4ba24bb07bc4a1b6741d9. 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/US83Z2423208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492e2d1c9fad187c90ce01e33ac6ceb452cb6082f6426b9c68cb2e7efe29d56. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US83Z2423222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f5a87a18c859c6a249b6623c48ca4907eb557fe6f21fd774a87d2c8df096d7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US83Z2423211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770400e93b85085cb74f7ef9d700e9ab698bf9bdb591858ef679ef2e2753c39. 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/US83Z2423217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19014c74960604cf4cfa09ac8a7b167c11f59b4093a025113e7944b58e3ba3c9. 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/US83Z2423219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6225bc48c64f3cb1fb7c10d46558bd9cf752c48e70e43da16d2601b946581e. 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/US83Z2423212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bad8eb13ea49d5f2b22cfcf20b4eeb511584fa1b84c8be28d4bf8d92763eed. 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/US83Z2423218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46ce76652261fe06267c12f370f7be94bf78fc626171674ae96109de041393. 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/US83Z2423220.
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