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 0xd9708f816a4200fc2a3d91f1deb6468584a56cdeadd24842a15aaac557768b5c. 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/e617a219-295e-4341-bfd1-8431122b2414.json and https://artists.proofprofile.net/proofs/artist/e617a219-295e-4341-bfd1-8431122b2414.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 0xd1d97617035330c69801136467d8c523562f10b044b71453a28cf7ea7bafd70e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMDA62100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429069dc05399df2f97946ac07ff289aa312c3f5c0aadaf2ef2158c267ece4f7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMDA62100963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703428301f93f79859fd755765213be6cbc9660742cdf8f2dbf38b6be1624a48. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMDA62100968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae1880eebd9a7bef2b71ef0a6804e417af9f9befc7f836dd2832a5aacd1ca4e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USV291471058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197800eedab6ed0aad63666cc4a59462fb70ca22b74c4c5013f05f55c600caa6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USV291471061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8905345374cc9f2eee5d25edaa4db92701a23ccb52679e9d5002252b398dc01. 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/USV291471062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cb6401eed489dcf6fe711c8987a14b11f7b37bb21e50f558e4fecf4894df2c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USV291471117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87dd6b8ca5394c1284d35db30ddfed9bf40705cc444c2680f0cced4469e145. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:27Z), 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/USV291471118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a40e3848ffb29f092b0d8f424deb74b232f10d79fc9065c8db38e6557ad04. 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/USV291471119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983446b6880589ef0157e71b086bed3d827d1c22b2fbf6e415864594ea472f90. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:42:22Z), 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/USV291471121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7504b4cca1a8330d0776f87a2f6cefbad1287a6d2ee6bd9d8b675dfc963b4e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USV291471124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf46f6c5435631230f3bb3dade54ea6e05813a6388d5daa481117ad087325d1. 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/USV291471127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e0833e197e25e2dd817b0522da4895f686a62baec591d8d819b351c181fc94. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USV291471129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95256ddd101e03d47081393769822d9cc27964cb27e46ed25f243bdd7edefda3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USV291471147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3590990a625fe27b100ff9eb69716f84caf6a9db28aa8b7570d352f83d3d6a0d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:18:37Z), 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/USV291471150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56cadd560737c7c929aa09f9e5e2354b719768f16a37f114e3c270018fd693. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USV291471154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9670b5e62ffd8c5eb92dbae2796908202684c5218ca8b630abd0a241bd6b43f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USV291471045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ebf799de9a685732b94ad6e095eeb1cb6e1c36b72670086add271a4e74852. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:42Z), 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/USV291471046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d0184f2bee2a24843c6ccd8827d3c1e81b4e9421b84d6a6f4cab5e362cc70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USV291471048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc5a93adfcd721627b45dd2443de50987cd305e61074c66f0c24e46f7bf8944. 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/USV291471050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2382c9f58efc63116894d640c7a56b7da1fb6d5d2ca36d59198ebab49ed4ab. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USV291471052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139fea65d066dfdc6d24bbfbc98aee77f8b3221624c9ed1527a6704cb437ee29. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:50:02Z), 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/USV291471054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb221404a012f1ba9feaa56092f69485397bbe7c9d27f292b81b972eaec08e0ad. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USV291471055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d33d35cd47b7f90f4009c26d1faa588dfab3212f2671156a4891638f98144. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJW2577175.