Big Ben is the nickname for the Great Bell of the Great Clock of Westminster, and, by extension, for the clock tower which stands at the north end of the Palace of Westminster in London, England.Fowle
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 0x8450fdf664d15d5af877a633253ffb060a826504be77030724e5ff53ac0a1919. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97ddd641-515c-4076-b6d2-31ea1eed0457.json and https://artists.proofprofile.net/proofs/artist/97ddd641-515c-4076-b6d2-31ea1eed0457.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 0xf7f30933f963d642809f7bbad74558822f9c07c0659305dbe4fda6db56ecb18b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:38:40Z), 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/QM4TX2047406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6a8b0540ade743933b467a07fbe2da96f1326f3149e4561cae839fd48782d1. 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/QM4TX2065153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c00ff7ceaf05698d023c6969832b9324e054e66a88128aece5f7a28559b33. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6N22053776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a487ea791cf22a926502dcb010beebb032459f834904b4bc2386f161039961. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:26Z), 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/QM4TW2138346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f0816c3c60259aa7bc050cb17fece4d5f137c4bb4a14acaf98e546153031e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:02Z), 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/QM6N22232320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a533d5fc43419aef9683bf411d7562e89373faf726d5b5753ae909b3ff7e09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA62210265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9897b5229c2f37b9227f87a6caf72d08f983f52bdc237956b5b0f8a79762ca9. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMDA62210279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28938550ced569352b71925b361cfa0492130c099767cbf1b779a1008c49a01b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMDA62210287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152e6af3e6570837f41177ce8c3ea66b9a4205f6b20750ad274332528de8ba25. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QMBZ92377208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed7ced7bbba4627d14e903e80f5b6c71fc9695772d356a950f33e2637d397f6. 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/QMFMF2367392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd25bebd0099672505ca869cc6fd310c1ff2f0a531b1893b9c80e199203b052. 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/QM4TW2476403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b36f0574db19be3d9f864d1fbe556b12e6497f4994a2e7922f6b43b5f08667. 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/QM4TW2478201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10868b1f7caf2e509e6bfeb81ba5bdb34bc8053ee1705a933f10547f3514d263. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6P42417331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec398ca79f235a4ebd985b524996e5a4527ebd03f7c8cc1836aec9530cb50270. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:01Z), 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/QM6P42417332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1b7de8ee866437a25deaefabaf46522bc735816edfa83a79b8dc423c47bb5d. 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/QM6P42417333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4106705cd56b3c5873207eea55482c9ad839319d824fad3b04f521287abace7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6P42417334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08532e1b7dd46d4cdea809bf3273ccb16c5e5c96f1a4d04f8e7b8c04bd26cbd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM6P42417336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587968850dd7410e1afe17f1b30dfb08571dd92ee7fe3cad865d82d085bbeb3. 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/QM6P42222964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a61d1354f25a492a21459bbe72be6776f6e07958288c81d152c20ddbea7a4f. 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/QM6MZ2262838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dab37c516a3f738854130a06561905c06b2c5341c2fc5759692b60c77b0dac. 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/QMEU31612532.