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 0x58854946e2f5c746f0a02f0025450a39b7da5976fd4a2bb5df4c839149111263. 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/f16945b5-1c40-4bbc-bfff-54eaf06cc25b.json and https://artists.proofprofile.net/proofs/artist/f16945b5-1c40-4bbc-bfff-54eaf06cc25b.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 0x7d78e7c70d8d44f07249d49c88afecd2c4ce6d7d18f33f222ea632b3b665ebda. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEA661100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2a34130ac4278a708e7925161cbc7e69f0fc0512cbce36808047daec0ae16f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEA661300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597df0507614497b903bd2a6b94416d456c7d2c83b279a486f1bd14e6974e29b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DESJ21400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc785f4adae34c4344df4e21a27df3e5a67ac9f7ba96d8fe46648fb8c82ad64e0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DESJ21400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f228fdb947728ecd070140900d3c1ebf5ce74c508ad41bdac598de73128de4b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DESJ21400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e3a707e17c3051ec28cff2ca9863e451dd5e582bd83d7ffa28474fc0ec4523. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DESJ21400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c90659ce943e5647779112bad385b498e72fcfe9dd234d7b6a7104e00641446. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DESJ21500268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb636eeeb5363dee1884f1eb7e4546ee0106e414b8ebb6c81983dd8b9d7de5e90. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DESJ21600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f339f87f3bfe674ec533e619df3671f7d76e08628cc997701a8e0b6af2b10b3. 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/DESJ21600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5974a7ac9550b86edfce8dbaf500f0b9da5298c3aaa5731572864d78b4f66ba. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DESJ21600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6650d6d4a64eca559791c371cfda3f62a4a8915db18ee98c025ea4f9ecf83756. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:32Z), 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/DESJ21600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e6f805c8743b84d922d8f787bd291f121c7ac601d2aa7e731ab7600834480e. 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/DESJ21800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115cce27085e5f8474257c855e8388a1858892f77eaa53093520ebf64871b9a1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DESJ21800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed995d180df181b380a955e26c5e692aaff334751857d0c833d140d5406fc18. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:31Z), 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/DESJ21800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08fadf02e7fc8c0089b2354a6d74755eed1966f1b4476758d71b69e37c060e4. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DESJ21800198.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eb7e3dbf8bc1b8f76d0862f557c742b3d9de2548567263240306652bf03124. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DESJ22200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813dc94d0f74e035d76d139a165ab6863b5a83e54cd7d184cf4a7a25368f60fc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DESJ22200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a99b6019a16d0dfa55fbc62a98b208ece8a6135c17899aaeb48c0b7e72a2f67. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/DESJ22200126.