The Flax () is a fairy tale by Hans Christian Andersen about the development and use of the flax plant. The story was first published in 1849 in the periodical Fædrelandet. Plot The fairy tale tell
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 0xcfbe1794e469b5a747a061f6f7f39d9553ecfc0a2c9106365dc9590d6bbbfbde. 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/c1af200a-6fa0-42f6-aa6b-8ec9234d29e3.json and https://artists.proofprofile.net/proofs/artist/c1af200a-6fa0-42f6-aa6b-8ec9234d29e3.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 0x3dca99291297dded3542d96f3c05098d0677a63eb644ed96b8a417c55ed4c028. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5Q51813618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcec220c5fc2ff3f0690b4161e0c9396bf8da342079539901c1cdab745f4bdb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/SE5Q51819944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728a596109985033d7224b8fa2dd99eabe00de1eacd0fd1109a11d2618450f05. 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/SE5Q51827304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9879c76a6535decc0d828f1f22c1356a086f9a2e4560a0787ba66398b122127a. 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/SE5Q51805256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba5567ef5ee3804a758ed77c9c66e4c59ae3297909609234af3ca8981fda45. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE5Q51821402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af0aa66f008a8f393fef490b23d1e56907cab29876c63cbf466e0b14408e006. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5Q51815303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4758c3dce2dbe8d24fb8480cd0fb66e81068bd68fa2cbae497cf3fe7f21be5ce. 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/SE5Q51823406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d301ae774ac66b2cb530b9c43f7b6e653b0b65b1f95fbf7a161e0c67ceed09. 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/SE5Q51808338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3823abee174abd5867c882d8ea5c4525e3ed5e0411883d345ec6f94c6c805. 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/SE5Q51826643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6a1094ecbe85a4f1591107ea757b6cec4830f68d8f65574c0a572f76c7cdd3. 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/SE5Q51818785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569c615c20e34ed93f317a209fb66b1f3cf08f9b17a2bdeb4c0835105cd2c30. 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/SE5Q51816364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dd2d2bf3a2e89316a13edd5e26e162ad4252707bc5927c76dc2cd1f2995b39. 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/SE5Q51813864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbcd6c8d2c1e86098419e1534462a5d7fe1ce7ee7eefff0e078cd8c643f19aa. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/SE5Q51815904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b78d0415bed4e92054e14c71d144efe15114b3fe60ac2211ca85a6c4381dec. 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/SE5Q51825111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63f0f3664c38444f966046920c668fe79514e823b0261af88dccd763394c382. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE5Q51803770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dfa3fcc58ba56de59b3d7d44b4642714af39c662e5147b3288535eafe80051. 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/SE5Q51822162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6690c265fb35151a8a4e5648cd235277ccc859b6b80874966101740dbe91a2. 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/SE5Q51802319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bfbf32bbd88d12598bdb2b56d63a6388ea08652788ac8462d015b9f2542dd. 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/SE5Q51819979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae8033931b392fa96c5c73fb07b0678aaf2e843358455aa68f363178d47c1b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51818441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aff9e1f4bcbd012b04df1ccb93c8b2841e1d98942cbe173c4bc7cf31e2020cb. 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/SE5Q51822414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd6a326019ec0ad89f2d8f6bbe6e8663ae0a19b06abb5ffe05fed40bc82b4bf. 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/SE5Q51803803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd35d5b49f0f95340c590bb6dedc2d03df16584e1262a951960900f609e611. 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/SE5Q51812222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25031e7ac610d3feb48fc69acbd709e16f498b8b216b1febcbaa227c75637ca7. 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/SE5Q51814427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9042e544b537809fc0c17e9d745ade61cdd7e9fecfc49970a9dbd2b70308918e. 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/SE5Q51814224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7dd9db058baa7d6197600946fe2481d5146e8cb8d5199b7dfee4ef8586a8f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5Q51822363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38200ce8e7598523efbbfee95020b063031b392301e3284926285e5be0e95d8d. 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/SE5Q51812568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d47255347e5dc4a6a5d096a1e3949c0e49aee248422d8f5e5fea3192f9359. 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/SE5Q51818508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351e351182fe4c327ccb89ccfbb40fb67e6811f4553ab8e0121e0955fc4da91. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/SE5Q51809611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1119d312cb64862a546327662749cccd1e6478661ee32c0eef0022d0d3bfbd71. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5Q51826984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c255cca015aabd6f024089a9623d7f88b264b94084dab5a18d494b4cfc80ea7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5Q51810657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aeb6492ca46ed32d266fa6ed50b0639905f97c74c162a35d8b6641b3765dab. 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/SE5Q51820105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ce43c08777d1a6552f9b947dbecc938dd4fe4e67e9eb52a77189427e213ae5. 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/SE5Q51813803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c0d1ae546075388722156cc854e2337c0841851441766287e6894e61e7b67c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE5Q51824667.