Horisont is an Estonian magazine published in Tallinn, Estonia by Loodusajakiri MTÜ. The magazine focuses on science topics and is written in a popular scientific style. It includes interviews with sc
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 0x210155a509e6961fb51fc62467fac99f5fb6f8e115683422b20d62358924f2e6. 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/eefa9843-2e28-4d6b-8987-c69482c2fb2e.json and https://artists.proofprofile.net/proofs/artist/eefa9843-2e28-4d6b-8987-c69482c2fb2e.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 0x6e9860577a692859c619c898e54fbbcada8509a0d9354bf00942299c545f1b76. 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/GBDHC2014601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb86c0a30973e5e5a4b9bf2198e3cd66a32b6b9888435923387f4118bebe1c2. 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/GBDHC2014602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b23669f97cfa331489e0cbba9f92fe91d063ecc32e4e9c1394d81ed11827c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBDHC2014603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb618f865c7cb6fcb9d47fce34c0cb7e5968fd4d6833c400dcca2f228cc1945f4. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/GBDHC2014604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bbe503c13d26576802ca5c4991fd8bfb7e809917f5b17c748b87b7392b72c6. 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/GBDHC2014605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55349d17d60755b025bc69fb0634c2b82e53443c53c40bba49d61159a3e4b5c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBDHC2014606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bffdbd0569bcd2a6bdfc062128d7a0b1633fb685233a1a5824eea8d89c917d3. 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/GBDHC2014607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d82de929c564afdec327877c024caa1158ee0fdf265eca5b6a60cf7089029f. 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/GBDHC2014610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c21da7876c342a9f45701e3a240904097e6acdc49e631371de1e70d251ff204. 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/GBDHC2014613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878fb14e2a536b21c21791a12473513b0d7835e24a5e82700a5103644ec0ad1e. 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/GBMLU1519204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ba2833b7b10e4713db851a3e712e103edc11922b01ba12971630d82eadf8ca. 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/GBMLU1519205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1f1818d6ff2670aff36ca402d070effa81b0701fe476e6fdab19bbb6d643fb. 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/GBMLU1519207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9967f8a7f7f37c5b4adb9858d771ed452d5027a1e7842b5982f3dd5bbc4a139. 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/GBMLU1519208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfad43b43d9ee390b9c03e4b0723142ee3e935d15fb61e8da655b4e4beb1862. 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/GBMLU1519210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb686c630c1f9123dea59696f3a2b3d0a24570ee92eaf5af50f4c6aeb9f360734. 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/GBMLU1519211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74818d444aaeb5bb7a09a48647cd896d692ed4e31cfb260687835c4b8d038cd8. 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/GBMLU1519212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec3d59c21da061faffc06caf70e0bf2f303f6e224196f9a21fb2f162e60c6a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA61315822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe7ef785f2e2a0a92e163999bda6657c9a852b1e74e707146c285dc93b4956. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMDA61315823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf51ec8a5136447d599f2920693e6b06b832103b60d11013c8f388f404d237f9. 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/QMDA61315824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2e3f3cd3715d52ac6e1bfbd98efc534155a623657ca7fe62eeea6f0e0e1d3. 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/QMDA61315826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2b0cf435a6417f86ab91c43b3f0afe152d29953b1ffbe8f9fd71b7aa97d0dc. 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/QMDA61315827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209b77833715a0545a944ed329fdabe5b6eda489f41d30f15ce885b6f4d6fbfb. 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/QMDA61315828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d06cff9ce0454b37d985ab0fadca7a5f157e4eacf179d46889c59b5eec26c. 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/GBMLU1213601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ee0e5c443d0e5712634f5c2ecca03bcfcb786ad5eac51718c783932de9787c. 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/GBMLU1213603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dafba767b1424710fc39c91db432884fa8a80ccdb827aefc59ce66345c74154. 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/GBMLU1213605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113121e2281a2771a6257fa4550f00cfdfec696786a78224ab1bdccecc31565d. 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/GBMLU1213606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd572793032dc9834744f1d305775d188f463995c9fe83d2cdb7171a5946a2e82. 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/GBMLU1213607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83558b5b6f52bf12edcdfb8133bdf74b31f81aa900918a4c43a39169c6de474e. 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/GBMLU1213610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfe4096e7e702bfb92bed7af0deb25cb6a5706e40d438e557d4422c3bce684e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEWSR0900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3f42ef48eb81965283e892e6fc935d0f519a52a8f817b46307c45178eef62a. 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/SEWSR0900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a9b92d81e7a2fd1dd054e4b3e11100fd6216a55476c24b414b1e1dc1cd5f9. 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/SEWSR0900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063f6cdf3c8b3a485e32b0410507b194104024f7a3c8d9758ca4b7edf7a4b6c. 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/SEWSR0900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06113df87d9c60417287bb50db2c03b276497d5f6788c1602bfd99b4d685c54b. 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/SEWSR0900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3166e6fc183a377cde004cf65075f1a051b34cf6d83c6a4bdbb387b56ce34. 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/SEWSR0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb86c0a30973e5e5a4b9bf2198e3cd66a32b6b9888435923387f4118bebe1c2. 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/GBDHC2014602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b23669f97cfa331489e0cbba9f92fe91d063ecc32e4e9c1394d81ed11827c7. 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/GBDHC2014603.