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 0xf36104e9f5e034113506a7fb336f426dd6df5d49df59310f5d929da5b82effe8. 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/4312845f-4539-4ce2-824c-1eb559ecb6d9.json and https://artists.proofprofile.net/proofs/artist/4312845f-4539-4ce2-824c-1eb559ecb6d9.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 0x4a6711542141bb761f70ee8c2a221afa9b077e2de24677b7834aa8ccf1a1c673. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:30Z), 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/BK4DA2414576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01669eed3b08556e5b804a1113c148c34302da1b896ad32e7b909a6f7e3d217e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BK4DA2414633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1daae41125216800082f46500647e424860e036ea289a025cb3d0e290d22c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:32Z), 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/BK4DA2414564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9646eddb477f39d3eadb94a5bb809d6e19cd3f4905fdb53c1d3ece475863f80. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BK4DA2414528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf42a19db8ed07af0032d959214dfe3b8c93d486fa42d4597b240e2744febf2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BK4DA2427235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d24d2bdd68b7350bf656a82758e99d255decff10e8c54bae398d9dd3ab861d4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:08Z), 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/BK4DA2414538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8648d4297d096192d7d4c1244ec7c626ad67d3fc317f9c430d4d21f19dfe04fa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:39Z), 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/BK4DA2414632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965cb1b713770fa503cca123d134541a7df767f10712c85d55ed2cff64766d59. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BK4DA2414536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0c7bbb1f36ddb5529eb4dda1b89d8b7b140ed0302d3cfe0f99f5b184c4ec7. 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/BK4DA2414535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880cbca102db9ffba16932dc3060c54149ed0b9cc4fd6b7d84f42df8838c538. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BK4DA2414554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720027e16655d201857716d1350e6ad02baf43d3c6c7545ecaed40c4b82424ea. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/BK4DA2414548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eafacc9781a7ad9b77df4681f51e61e52b036cbd26f7056d86638eeddc6aa3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:22Z), 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/BK4DA2414529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1924be09391fb72c6aad8ddb3aabcac800d1a0e3fe26779223df0d922128f4e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:30:50Z), 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/BK4DA2414544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26aaa028809520c1417d5040c8e8697567bd1876c8c2a5f5603ee20a4b8cb7e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:45Z), 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/BK4DA2414598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e2808ac5723e9493df4b5ea71c75f42ba22241e124bc926e929134fd01203. 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/BK4DA2414542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be1214ef6ba768e973ebe9bba9e54a07664bf0729128b15a81a4582914ef276. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BK4DA2414613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088f6f160d6bca794efd474951c212169439f6e12a9f8a439a960a2ce6e66fa. 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/BK4DA2414539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f80163ca1410dff78d5242a893fbe1633b0896a8c2eb9f4eedf8a64823db731. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:57Z), 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/BK4DA2427223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b042d7f8d85fd17f7072213fcad98c723616bcd72fe07ecea7a0de0943927. 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/BK4DA2427224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656632539d01da44648f0d4de8ed86b471e9783d63100d9ae8b9125c006652db. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BK4DA2427233.