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 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 0x8ff2c5cd5590c1833615f85aa60e0a283f3603debf7f5617b515d2805c5c6829. 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/6da3cc24-7c1f-48b8-a6cb-e826aef7f215.json and https://artists.proofprofile.net/proofs/artist/6da3cc24-7c1f-48b8-a6cb-e826aef7f215.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 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 0x986d7fd2327bc481292d643fc1e77cc27217831db7d8fd51f8976f4693a83e1c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:03:59Z), 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/SE2L21100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2d9251d17945b9dea6b5f0bc28b77d331b30c6fe7c76ebe6a5df66278d8b1. 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/SE2L21100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fa34e81a746d0475b7cf9d39196bd83a9c850e4c0f0650a92ffc8eb76e435c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE2L21300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37c81315cac54c9ea320f9b52ce209f630eab180246eec022895de1cc5532ca. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE2L21300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d41ae1dc8e7c0408a0ae67cf2d0883dc2e02de31aefe3610d25b5b2d2d569. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE2L21500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5515ca31203167c5fbede0f7bf65724d5499536a5f80daad59daa5908f6200d. 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/SE2L21500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef63a995d7edc3fae4593aaaadfbf35d019013022d9b128d0413de94cc21e43. 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/SE2L21700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8cdab8ad78c5e8dab69010272720745fcb89a1a0945efa8b56b77bff30ee91. 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/SE2L21700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f61b2e87de64b628b91330a8897c2dc6d87176dda21a1640fd62bb774cf6c0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE2L21700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900ce25d76859c2844785b330ee8c8ab1ed66aa0d805030cee9912db8e0e5913. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE2L21700110.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f74ed5b9af9f255fd778d96feb0cafb8c99f6a8f34c7073e46e02c1488319. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:20:26Z), 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/SE2L21900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b755ebd482264e8fbb5a808ea92aa658bfbe0dd0c1734d1809d7beab7df8053. 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/SE2L22200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c7006cb5613405f9bd5c319169af4d98bd1e877d0e35231ffaa5a1868ae33. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE2L22200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db5e77cea150dd5f4d8ddb0a70528be4eb35ff51d4f6e3b794dfad1f26478b4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE2L22200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d425cd5c6680c1f0997b40b0a66f37eba42aa128b0ab7cc778b9a10182bafd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:26Z), 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/SE2L22200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e0a3f8d4b2aea798cd2212e5e9a7b52a2c3b9a45b3c3b3cae319df25ee6552. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE2L22200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4536418f72ebaafb6bec7b4e8453d520cc4df8e291ff18f36c31b4fdb30da73. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE2L22200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5ee09399da15779e8ff88b196424cb3b0b63f3cc05c5d5cf14e0e55cd5b82. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE2L22200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045694af886aad478b9d41e76b6b62915afe62ec5334e465c3bb26e8273426ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE2L22400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2955ba648cbdd589ae9083b6a35ae800452e7789e25996fbf60158e985e6813. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE2L22500301.