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 0x0b1fbb039c86cad7b4936be56d875ff51924caa399b191c99e30f58728ef6540. 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/d3bf5e8a-9c91-4a8f-819b-05e83d6c42f2.json and https://artists.proofprofile.net/proofs/artist/d3bf5e8a-9c91-4a8f-819b-05e83d6c42f2.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 0x5ac95382882b4ec3cf639bfd14da68c022d0aee83fa2f476d552b721c5109ffb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBWUL2019223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479f41d492e6757c3fc64b5ffd92691f10c4a1aee09dbdca09e26d7c0031e6fa. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:20:21Z), 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/GBWUL2019231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dcc6996db6b734477a8b94559b0891078a5a5ea78664a01fd7f6ca372fa2d6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ5FN2001277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaba3b6015032cdc844d58016efa1932f7878096e5a58ea9908f21e39f23751. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZ5FN2001278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580081fe3c99a021eff93936d428cca0c48437fb145c05bad8de85a73fc2c04. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:58:24Z), 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/QZ5FN2001281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd720cb5615d3e7b27e38c75061a99d9860e3a10f0d7e2b60426a9fa46af9fc8. 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/QMA5H0910854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc44242302fac59560c5a5d76c57c4c4e14a8231141cc1341f9bfd68917a7a3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:07:37Z), 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/QMA5H0910855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82630e3a74b4ea74e6786efb5a0be1945a5acb52d6d4399384eff9009bdd9b9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMA5H0910861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a47ea1c0048a6b1fe3d390fdf70fd2f8acb185ee2bf004c92ec1fb628e2d2. 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/QMA5H0910865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab73d3fe0fdff1d182c3a98a82662e7b6164e45538d0b161c47d98be778ac852. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ES71G1638492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d29f1db6448453eaea93f62608cc485f6ece907c8198a6def2c8fb7f54e9f05. 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/ES8591601059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf5deb764a92821c8deb9bc1c35c84177d741fe790c444a648a2f66dbc65248. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES8591601062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf814a4416d0e789663cbe4d9534238989c5affd9955de5b50f55cda2fae67e87. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ESA011942364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b4afc0c963a52478733e8a1ec7429df44568ddb663a7d7e68b9d1f61586981. 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/ESA011942366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92acf6bb00be97c29f6772a5563343c3ea433136c2f71be0830adb6b4769137. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA011942367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2bc1cc5bf2b7446e41f8d16ae14587bf53abb8e737749a22a63a7ced88e607. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ESA011942368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6273e8f11fd9955430283870d1471c0eb952830e2103986c271afe584b9f70. 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/ESA011942370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d0595a6cf6c863c4fe29e604191165c38364f32085f57490bd261d7ad2c2db. 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/ESA011942371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ad2daf71806c404687327d50aa050df6767b4487f103fc1b976d211a7f275. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/ESA011942373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e082aa268ef8dd7c8e45ba60367428a205b194f4f5f0b517aed26dafec683. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:27:01Z), 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/ESA011942375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d704f80e3e2be0e952c20c078357e2d36d4be2546d81855d8733ab6f59cb78a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ESA011942377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57941fa96de7785183bd0c4173d05ce1fd3bfab5915fd85c53fc793fa248901a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ESA011942379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4aa415a69bf7e9266cd7557cb85ea190e2a9fa52d62ece33c0ce443c69ebec. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZTRX2377926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b35f1226d810d698eac573bd858736fc4645d1cd1ed57d745ba87cbc04382. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJX2515444.