thumb|right|300px|A village warung in Garut A warung (old spelling: waroeng or warong) is a type of small family-owned business — small retail, eatery, or café — in Indonesia. A warung is an essentia
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 0xfa6084c13bf5ea577277677513bb694a0612e626d1b4bfd78d772b4cf79ad451. 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/af737131-8e36-4ad0-a428-f9b47498e597.json and https://artists.proofprofile.net/proofs/artist/af737131-8e36-4ad0-a428-f9b47498e597.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 0x163decf3347e1bda5b15a39046b0c27985ae302fb05aa09c89e56948b193cab4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBEWA2104330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fc49946bf42eada43175eb78d8ac44c67e92ae61065224c6f3d5a449c8b0e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBEWA2303020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9aae632f4ff8c71fec3c56d688715b223865dc8e6af33bb82c8ee7c9957a9a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBKQU2372664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8501b80decf26d3aa792646f7711accf5bcc61a02f214f6d6034069166889fbb. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBEWA2305420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd009b417ada0f55c93ea6c8d535abc39328c0049a3720ba5196b10d4398df2d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKQU2431500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329809517e1701c40cb967d166b3d51efec2a5e318bd1e165a797c1c634485e3. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBEWA2405281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf969a6384d91c778982669218d28a795cad11c04eef6346442f33bdd6a015e73. 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/DGA0H2493820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33fcfe3ceefc76e039ebc69b871d6aad78e9ee411f4c7d3f5ec641774ec9a53. 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/US38Y2553751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a42a1bb55c92f3cfdda9fc5841ed421d427e5669338cfc347bffc5af9b003. 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/GBEWA2301591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee35df07e666ce4a5164136cafa79c556b6d7bbd3f5e1a3f5b81252ed32e9d9. 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/GBEWA2301603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db5a27460ffb2a3b4fe3874c732157b92107d13663b1e15170493203bb523cb. 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/GBEWA2201474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de6582a78c45f747607f6accf10a23c0cab250a8aa5b9b51206f3ba6dc1b928. 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/GBEWA2201478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb448c71873eed24cdb99714970e415b22e6dc506e9d7333b53c577cdc3c5956. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBEWA2401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372bdf27536f1c73103da00031ac98158cdee15411451c2d8b4a21b2ee5e7435. 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/GBEWA2303760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fe11cacde2156640d958e3cccdc4da99277c0bd78e141d8739c26b5f01a04b. 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/GBEWA2304549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873f64f66ac5358a37d54eea4b3e6983cc07ad35113bff71a4f5a0aec957cfb1. 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/GBEWA2302001.
The Anjunadeep Edition 429 with James Grant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70712a7399e25e2ccc8829841e2582ecb9794666659ea4c5b292fa98b072c187. 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/GBEWA2207324.
The Anjunadeep Edition 384 with James Grant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4aaa6ea21d51b167d58d694ee447b50dfeb4e65f14e21c679a60ec167eb0c0. 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/GBEWA2200674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00416e1ffbfe4c630f4f23a725f81a2d3d500d7a68ac6c266a8a2b7b901b947c. 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/GBEWA1906071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b44ae8c2deacf9222ba55bb2b6571c792c4bb3b236165dfe5762f08c6a2ee3c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLF712208192.