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 0xd6149f62c749a06c809c1a60fdbaf071608d3ac955feeb3221f8115672483fd1. 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/5b500c64-3b0d-4f7f-9f0b-ec789e91023c.json and https://artists.proofprofile.net/proofs/artist/5b500c64-3b0d-4f7f-9f0b-ec789e91023c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Obituaries (Original Motion Picture Soundtrack)
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 0xe3507fce4300858e968aa13f8ed1411012a0a71f0c50dea13aedd0a86606d02d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFU2134007.
Noises Everywhere: Field Recordings Reimagined
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f30544e8c418f2eeadc7694a65efe78e1b010c43be199709a6b57b705db67e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAGE2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f30544e8c418f2eeadc7694a65efe78e1b010c43be199709a6b57b705db67e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAGE2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797aafc7325bdc5d3186ae0ec46310aaa73cf175800bb684acbba6777813a8e. 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/TCAGQ2204214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7915dd1c434b8ceb6a39041fcc0c6c4dab5e37460e14f781d12b6a406bd09c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:53Z), 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/TCAGT2330226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8863d72ea091e1a03f507dffb868687abee86607b7672f2dbf196e6eaa24fe6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGU2373024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80dc66dbaa1bcfe9d0dd6a4f65f350a8f65dac5c8867030c90c00263aaa4f2d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHE2380579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536cefa586c60093f627a3b1be32de6b1cc7a3c89e765eaa7edb7fc220386af. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAHG2300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd720bce7f608cd474acf1b3df10ecbe6db028ac343c4c70303376735ad35e84. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHG2311221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a20fce60145934b680437333ad9054dcaeec07a3f1c54a592784caba31a230. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHJ2361155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd720bce7f608cd474acf1b3df10ecbe6db028ac343c4c70303376735ad35e84. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHG2311221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ce44e8f0f7ce80fabcd057d1d6b6dc527636f7e6a9075e901cebdaae4df6a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:52Z), 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/TCAHJ2361192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80dc66dbaa1bcfe9d0dd6a4f65f350a8f65dac5c8867030c90c00263aaa4f2d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAHE2380579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2295a5e7fda1a546a5a897cf1d13c7edc10a0b7450e4611e8921ce55f196e1f. 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/TCAHJ2361212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11120d0b97807c6fde79d9c9d883e09f7dec34350997714f719dd0e3359c82. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHC2309641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b4d34541e36dcecb05f530d02aace3490af6db949dff81a57a45e50d968640. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHJ2361240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f69874a3f913cf7473c5b6cfbb1b3447226d09b02262fa20ef61f5691886b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHC2309633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23579e1aeb4bebdf4e0436b82ca424dd4da7841fa41e8841ff1d0d629fe1c0ef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHJ2361268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5e29d2b38977d4724bc1de06e275bccd867abe82cd16fd347631c098ddad33. 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/TCAID2491781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58352f7229352ffaff937239d33049ab808c1b19aa7cc00a410cb9ee3a2ed515. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAIL2445852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc2296e07f419855b6830e4faff6a7b506b9fd79dd6e2b7a31ff972302ca5cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHZ2454469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad032316fb511e732ae0d320e3dea01cee5b016ac11c184268aa3c55c611560. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:53Z), 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/QZPEW2504029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20735174fb6e1f37dbbbca88e79e7edb45f810c7cc22b31f9025c5f520b1be7. 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/QZPEW2504031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c5b4fa9f1fc318f0c2ffbcc9f4c3f2ddb7ebd6d0e71c0e01a594ee3824b027. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAJJ2527886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3591b04edcaf257bb7a2ee5c5fc5173d7fbc95f861af8ae6d264ce2006dbbc7a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:49:08Z), 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/TCAJP2564714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e802b81b6667f239edeefeb1ebdffd519ca1edb2774f68838dc55f3d8aaa8f. 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/TCAFX2132012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3e1cd111f531a1b6a90a455b1a835415b04b2177c9740fa9df50fbc0b71cbb. 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/TCAFX2132015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1009ba6732843fc852acd302b6b63730509b2141dac22fcd63e9f815955cb2fa. 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/TCAFR2143021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af8b81dd872940415c08b4baa3e2dc6fbddb0b16ecf799eec8c7bda5d835e78. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAFM2175253.
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 0x87fb6f659cd71578e3494fab4535ccbb054f3de546ac0e96cee78a4c8c417f6f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAFK2159643.