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 0xb0faa79c4bf4c551bb552bd24a7d1fc5800f08e9b6f4555c68d8c9214bad0dcb. 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/0e62a252-8e6a-41f0-bedd-ccbe1fe00d7d.json and https://artists.proofprofile.net/proofs/artist/0e62a252-8e6a-41f0-bedd-ccbe1fe00d7d.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 0x045041c08ddbc9867533de2914061b6d45d6554628cc9c86a47b91d19af29a61. 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/TCAHR2320335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc93eb63936fd8dd738186fcd5d99a92c51d69b9daa9ac0e0aeda6c2f5ba403. 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/TCAHR2320320.
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 0x1fafe25b0ed531328686bc48c79c01a5a76dc347301e0e5e8cce35ef69095749. 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/TCAHR2320564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb02290444695af06c26e646b8c5bc5e2ceec4a7206435ae24c3d3f030f79a9c. 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/TCAHR2320576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7128316802e583598519d3accaaa4a3bbbd1dbdc4bce126b4401da8372185546. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHR2320886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ef8c500b2cc6d3cc1d1ba35fe78c8424107cc9ac9b7b3208e5c7c1a88a03b. 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/TCAHR2320891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b596bde6426972f35925a9ecacbfa618a6792fe0feaba0435af45efbad0c8. 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/TCAID2449913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82107addcabca604694a01253558e2e953641287fa3ab141722afcf1f8b3701. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MY2354286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5748df63b90bcf8ee8f9b7a68fab87c6d1c7fe6087d71c22b0d16edcb4bdd67. 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/GX5MY2370942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce1c7cb35c1641d9389b84f1bf042143ea12f715f99d13702ff7cdae2b782e. 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/GX5MY2397088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e3a6b4e8dd7be789cbff717e1f8ceb37af7226361fa5fd746eb0b722cdf95b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GX5MY2332178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c8b8b9c89c8edb31834262ae570b92c8e8af6443f46c30c861431380dccf6a. 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/GX5MY2323901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4682eaad1d5dadfd0b0eb50eeec3f79e55c1a478181c5d6dfbec735a8a15a7c5. 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/GX5MY2324713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f27e1b60e212f24e903c5bbb11e869f06587415241808438723afd7a789881. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:03:10Z), 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/GX5MY2363675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82516f00f4cd0e815c236b530ab14202f29ae725c85d792cd6bbc9391596b3e. 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/TCAHR2321003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3864bf5b160f1b1dd77154e6a7e8ea1a55212b0f239b4f186a4aa9e5de8f760d. 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/TCAHR2320073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb15ba90b36f37f63db1474e0047dce21d09bca3d4eac704fc247270810b9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHQ2344593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e30c9958051eaaad6a072dbf9d332b1e364904abf83df17f7fd2f59e9a93be. 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/GX5MY2345847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759f5e4d739adc4001c8aa1dc4ee4a3c6280559deb84fde606690c156c29bd41. 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/GX3HH2313963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8140a0f356e5a81c9a33d783e6fae2dd526412664bc88e1f6fbf2c7ab47c08. 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/TCAHR2333456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dac189be20d71f17e4b1f3bf8aca3835e5e480589e7065ef7f4f8c6174a5d5. 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/QZMZ92472899.