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 0x54de747e4c40652c3f7cf66b365fd6e2a38a60bf7b94f66bfe12797cad164ac7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f91601a3-a64a-4533-a5b5-9c6641ce7245.json and https://artists.proofprofile.net/proofs/artist/f91601a3-a64a-4533-a5b5-9c6641ce7245.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc776744b01f20eb84be1e134046cf2643f46998d9ad86a3d886d1ea07b9a303a. 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/PLS922087537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55fa108531c12b06dafbd2fe640d403fda29dc43ab45e907b4870146784a449. 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/PLS922087540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc34f69838a783324349fe223afff30b1aaff8c5dc3ad04d57eae0f0692d8c7. 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/PLS922087547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1238160b4716b28010e154f1be3dd7b713e4e9ad99083a84017b66fa20fd5eb4. 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/PLS922087550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d9699772faf5e7ccf96d026d40d366a953e1c46f4f87f39471e2dbd14009ba. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/PLS922087543.
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
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6746cde2278a154eb724f48789aea329475660aa2460340d962872955f437a14. 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/UKZVC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b6b5500cd44b8eb44bfd64fd5b4e4789a7d9ee9852a657719c0ac8c236ae27. 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/UK6821751793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132460c24caf36f7f6ce4c7de9d5508ecc6d7b5f598dfe1cf2ebb75a8e0d3200. 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/UK6821751872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d2753756d744d973851bb764ba1d31b93f6bc2532d5ce294aa572d38991b5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UK6821728491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37158e8df49377f245d800806de61fb68b8e3e0c414b601b7646c070658ef98a. 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/UK6821751638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533d480796188bf6481aa39d0370c8733ea74e7ad5fdf7b0ae436086c99880bd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UK6821750439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be579d9ea85358119c4c8c65d831a18a0d263a04fb606c1446f3bfddc45062. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UK6821751791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519e49b0a8723ebd75cbf232ec3b0b9420969d02a71d45b1981cecf26f617ccd. 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/UK6821728489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89606ea302d6f27207e7df89762d0d382be8fbd8406398c5318ff077958f6bce. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKZVC2100398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a9525f54674e3a262a96b0c6412bc7db4cc8b80d1ebabb2a2a8732d5085da3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UK6821728628.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e517510542e06ad6ed1fb9077b41e345cf198da17c118738f4eae397d5ec9c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PLS921862326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8ebc7f5fa9d839e339ba7350aa608a3a309d13e93eb9e06a781eb888f5c91f. 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/PLS921862333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c21fd6585bd683053ec7a0820d26f456f13bc5b986a5d91bfc7231299b5f0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLS921862320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696ec4df272eb3c8e4c9aa31ccea4bf809b80c30457d1c93c2f87d640b655d2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PLS921862321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dcb0f14d6c304252090244461c1dc78caa68891ce0df6e95d78a3b28257d46. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLS921862323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a78cef968130751023ef08a41d58f3a171979a476efed5b48e93aff9344f6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLS921862324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5893c96cf6726bd4b4ee3628bb1cfaa0f06d56517e710633499e03f54b774. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/PLS921862325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef9fbc73db7c349e0bfd735d52ae53b23ed6d7e90097ff384e5fb7e508e6033. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/PLS921862328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2d4b69e51df4021c8ec65b8e84b49c235bfe3fea5034ce3c443757453899af. 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/PLS921862334.
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