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 0xf2c15c2ddd17f23d5afd4c796f28edbfa61a8905738121f4be1146e02dc5b436. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12870b99-e6da-4001-a67a-918ec1aeca70.json and https://artists.proofprofile.net/proofs/artist/12870b99-e6da-4001-a67a-918ec1aeca70.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 0x84508ecdee497abde737349f32f8165afb9b0ac2b850fa585732225dfc194c66. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:42:00Z), 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/GBMA22130099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1282e0555cb20d4b2e8e9efa5c25371ab49134c5908fd51cb0067dffee3415a. 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/CA5KR2454637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb268fae6b9d8f234eaa21e1fb4a10b626563628490508b92f07288f4f4ce38. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2456910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e86fdc2451b0900a18c5fa1b457ad1838725db5809a3735541e3e6828885d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CA5KR2456911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04277b6087a8c28dd22a963daf10b43f6c0fabf5be87bee31c7571f8092c73ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2456912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173873e3ab1c41b0a8829101855961c6894bd5c499849403e5ad1bdbe77275d1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:37Z), 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/CA5KR2456913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1ba83a47829a15929d3969d6691faa6f06fa26d6f6436ebc76869dbc1a21b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:58Z), 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/CA5KR2456919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8363ac6b391b3caad171ebd3e956b12a400fab8786fa038ea49d845ea16e85f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2456922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243cd078c734664d70b3db6068838b70094194e9ebcc7b28706dc03bbd48d5e3. 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/QZTGW2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3184db9aadcdf471e59cd34114cc1d15743c850b6c4f2e42019ec0a026237. 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/QZTGW2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3472d76f5d0ce37801a989eaa561b7948d92dcdfdcb979e30f30ca6bf3433c1d. 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/QZTGW2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac836158b32776e7df63748bb3662ad3bc66e45c559026933989de2a4e89631. 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/QZTGW2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e79d25b0d4fcf810e62adff064991679e96000f92741d3f3bc815d9904b1d55. 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/QZTGW2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70c3c02fe274e0aa38103556c3e0736cd7cc05ec7b1ad43ac494903894fb36b. 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/QZTGW2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f241bda19b356745c4ad2dd4a8897192c2368273ac26dc86a4dd67f726b72d. 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/QZTGW2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1807006e3855208f65d71c1f11eb70faa3e64bdb117a0ad9fb8fbbb3bf5d2538. 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/QZTGW2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eca40af9d466b65a9ea93dca28bd7ab01b878aefd8a7e747a620163a60e8b90. 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/QZTGW2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd15ddd4de7dc1c9e6294d330dfce65aea0036588ffbc8515ccc5a149f1d447. 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/QZTGW2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d3bac1301115fee1c2819a1626a321fdf364f8234bba1ac80dcbfe9c57c283. 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/QZTGW2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc4b82c4f21b51b68f24a9a051032cc572dbe821388980b61b99417696ff7c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTGW2400026.
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 0x6bb0422d41c2d2c1398f978aa5cbcee2a15d82fd54e2ac3d49b738a0b7c0ec14. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTGW2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c0a486d7835dfabdf72d64dbf3ee1a7f38a348f257ffda4e00f964fddb115. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTGW2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761dfe11258c99fec0d11e1ce977d1f1210680d4bbd859dd4fc1461f426e5fe6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTGW2401251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7605847cba52cc15b85a7c064dfd085e3098b3259a9555af26655d2e55640c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:06Z), 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/QZTGW2401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb85deb9d18a1ffcb9928d5a12ed35e8d1a95262a2a387ad06069fd51a84f35. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTGW2401254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f7d9f974fd4415df66e52f99c99aa9867f6427c7f08c1bf21e3fbac3a3a0b6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTGW2401260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a22922478788036aa4c8391215f32fb0b9bb0cd823fc59cece00ea7789f0c3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTGW2401261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe92da24b76109d57ac78316b282f1fe4db867c5e6aa608ebe8edd095836890. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTGW2401263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c86fdac8942901e617c1a7ca89505262b3791a9bcdffbc79ca859d5c6dc8934. 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/QZTGW2401264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76142bd23be60e68c99f88099ac5343fe60873eb77eb4f8e152dc6353d26128. 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/QZTGW2401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dc3018b71bd7cd53e7b2d326bb13da58fec995c6b30505f2710c6d3954185a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CA5KR2463628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea024eb1774d1dd125d513def226411b520c07f1bf9a333106c1bdf4715dde7. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CA5KR2463629.