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 0xcbf1a090661a01507ae5138cdd711fa222e9bf2834d260bdf4fbb20e317a20e0. 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/11cc371c-8909-4bb4-964b-13c8c831107a.json and https://artists.proofprofile.net/proofs/artist/11cc371c-8909-4bb4-964b-13c8c831107a.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 0xb6709645e59834f8675b64062f0d4958d464546f16e4bcdf33d518791d193057. 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/QZZ7R2445569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58b33efe5344af1c738178a9570baa3a934cf08d71981296b275dbaf00d912. 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/QZZ7R2445574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa785576d99d3973bc258c79f7221cc8c58ccdc00cff3a50d4fac8c2ad79dad62. 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/QZZ7R2445577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902432df2e2607bb2aef2163e0930390ab78d19e3cfacf0042c274462befbdd9. 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/QZZ7R2445578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ffb3f98bd9fbdaa0037e4614eed6ebbd769e5edbc91e1d71be9a533803e75. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7R2444069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31285c77a20c55e667be9d2133807a8372ee39b8ec1574b7c602f2d61641c01e. 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/QZZ7R2444070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f6bfd6411d43a7cf32dc439a2539be0c740ae4f783f865f4c52f92e4d7129. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZZ7R2444071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e1921ff5e80250b80ada1f1e879634e8a86ec3c8f6207410478f99185628cc. 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/QZZ7R2444072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe095d1a59684008fc908e32aaa44b2bb0de974ccdc760d276be7336a641d363b. 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/QZZ7R2444073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe262739541276b8b565f6aa8143345a32f4b1304e2a52d0af4afd51bace63c8. 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/QZZ7R2444074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b843aaf53ab9239f36c0b630318240c611ef3dbb0e89cc4c71b2dbeafa7ac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7R2444076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8c7dcb1ee3f31fad9b73e0fbad5499a0b8cad5d563483d6463f83865c05d10. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZZ7R2444077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d1e4a5b6466f44c91900d52fac37bb180da7b40cd4fed6b3e60f15c721ba9b. 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/QZZ7R2444078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889729b37717a2ae64f2e127ea557fa7ff2699cf1c6318e93ddde8f557b761c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7R2444079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623026b5ac999c4c91382bbc1da7b91af08b13b7c8f0ae237785c639e0ef86f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZZ7R2444080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e5c2439f828a329fb75b4aec70881690fe347ec2b5fdc5d5228b13060f949. 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/QZZ7R2444081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e49179cedc01ee46e1b24232486d9fff675c3cdb9a45342cb2b194bcb608dc5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:48Z), 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/QZZ7R2444082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be20a3fcb4cf98395cb83a30f8d299f392212b584912ecadd8bea5d132c797. 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/QZZ7R2444083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e20df80695a4b122d7844067dbfa3c45f8393f3f997a415f81bb5c53a1cf7b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:00:09Z), 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/QZES52594799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074f400de55ac67840ffbe7836b1e5dc5d0f120d98419ad6320d1468409312eb. 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/QZHNC2538551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5f740be9aa923502a6e427e1e6bbde0844a60054c9bff1daf07134d65b639. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:04Z), 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/QZHNC2538552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde218a4f29e153acc4c2f573170a98f88f45a7e3da85cff7e983c115d21fa9c5. 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/QZHNC2538553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f4c32fdada24d8a2e9d3e1bfaab962a0b12de48d4d4d283ba20fac803fca7a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNC2538554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3ae406942fa6d4953fdc118ed9517098f4ef9c1a69c6610d9377b48e15809e. 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/QZHNC2538555.