thumb|Ben Bartlett in 2000 Ben Bartlett is a British composer known for his numerous film and television scores, including Walking with Dinosaurs, Vera, The Tunnel and Lucky Man. Working and living i
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 0x7901aeb703933456cfc407027a4e45bcadcfa03c35c02aff531b5e7383eb616e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a738104b-e60c-43c5-90db-d5fd691b486f.json and https://artists.proofprofile.net/proofs/artist/a738104b-e60c-43c5-90db-d5fd691b486f.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 0xb00b7a5097b3502b17f26ae96b81aa3d4332475d67b64f48b2e3cbbb1881793d. 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/GBAJC1900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493a163952e6460137cf24015fb923ff7bec351739ce217ffee2321adeb769a6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAJC1900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260b90d0512867856f412de9974185af906ee4d4050d2fbc89b499365ed76c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAJC1900167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0fa5c2794d09ae39541861c4937d50d99e9825f7e84d7c68643e87c63374ac. 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/GBAJC1900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b06de68d74a23ca4e1399e4659db2704fbce23a2e2ad883105414b479dfb127. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBAJC1900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95adfd170f003dc1e2c162f69f4f9c51abe61242d2cdd1efd0e84f8fb9a3999. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBAJC1900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5898cb940615c74d4c5c20d3153e732a7fc4ada119e210beb31644397bac7433. 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/GBAJC1900174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b4e1e3502c6c56f6ee46b0667f59ea2e640bb9fbacdd1a0ed32cdaf21622e3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAJC1900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b647983e1bd23325864f6ec3b94be3e5569b777a264af1ac9dc13989c2cd7. 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/GBAJC1900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a633b1892fb73b7faf3098edc199968805902caa687073e51d373aee9a42f19. 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/GBAJC1900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4651599d03d58c784ba89cd2b76c092bdfa4467b095fb9025770b34396b636c. 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/GBAJC1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff18b56b687ca3bb07ae608a73498289b576f6582a44f3739e9a3ca9648ebcdb. 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/GBAJC1900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c4d588b26b958abb0b7a53610cc40c8b57b088b7ca3c29f9bcce83fc3a821c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAJC1900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f1c727289473807e68c4a3b3a1c07dff6f4dd14680e9810a6622eb8edea23f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAJC1900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe140312e89eb8b7d38a91d1c566e37ff80d651abb01a74f4b3eeca3b952c0da9. 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/GBAJC1900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec51d4d82ae0b31e29e091050323e06ced92ebfe80ad93df1901469c5ed79d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAJC1900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910c008d725de1ac16ddc00f2cf8f16e435980e8dc584e60b9d254f19d5506e. 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/GBAJC1900192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43135ca60a9462684cc48f69be1e651b0fb9d228375ab5f8b45ff0d1903f9e66. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAJC1900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7230fef64ffdde5d94b6ffa1d35de008177fef40e40fba1659595ecbe06876a9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAJC1900170.
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 0x6d32b3c4ef3076835b01a9904524e2c320f78fc7897e099d389cb11aede57bc8. 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/GBAJC1900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda0d2cb32a332ca3e4bbfd2b81c80d9449f6b70e328e93d072acf385eab8a83. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAJC1900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18b06f408ab41ce8673e2f9b58c5e23ffcf41a836719337e6a757e6a2a79e25. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAJC1900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef9ef5823ef117d28fa0b17e6ac8f4b704196698ce2ef88acb7d18cdfddd9d2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBAJC1900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97cb3c99f5fea2070c3ddd808b4870662b555531792da3c1d2b6a83de1d8b4f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBAJC1900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e54d9f0c3ce09328eced948e47d5c02ebf327a7c4d0ee97ac091937e1fb66. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBAJC1900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77674e4835446d7def3c4733e0f1357c7da9772bcb947de06357b1e118dfa75. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBAJC1900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81954a25c84de477bb30b93bf26c641f885213bf9a9b33992c32693779036fcc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAJC1900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12626e8711b3a4245d6e55a2f8f51eeaff8db936190356ce3095ec842afe47. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBAJC1900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b43cc609100321a44538fccc622852ada324962829625b0b0892ebf33838b8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAJC1900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5819e0636234aee0fb0cd8b905abf87443dd32761507a9a47f3d93b6270f98. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAJC1900193.