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 0xe9f4269e9b2e2662cc4272bf3c3d5c75457211b27574a4359e98d366af8fdde6. 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/11cec62a-f5e2-480a-acd8-9874b2b8b1d7.json and https://artists.proofprofile.net/proofs/artist/11cec62a-f5e2-480a-acd8-9874b2b8b1d7.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 0x076ac3caa10afacb52817a3323371de831aebfb544efbd3c9102981e3ba6b80e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:22:20Z), 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/CAI371677950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7583b880791c4daa1db49ca0f5f31f3f6ba485bbd0b2f832da909b79b5f9c510. 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/CAI371712510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b8e3320c9683dc8a091b87fd183bbfdf4114abb7b0c4e0946497c13f887830. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:37:50Z), 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/CAUM72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897aa93f5ef72b99145613c53d0db8d6693a76fecbc3c563c8974205478528e2. 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/CAUM72000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3bc8515e79ede60bc2410a34e8b3301ab8a194ea078b19af50b8b7e1b77580. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:21Z), 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/CAUM72000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbee582a8a99a934126a646df5b63b67a26b1319e4107d8e56a67fe8ddd64fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAUM72000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0ea632d450e38e0c799406ae0fb733e5b382aad838227580661a6a092c1de. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAUM72000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410fe7f28694cd485491be8b7a3ecf70888cba78cd4ecb4bb781f13597cbb090. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:53Z), 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/CAUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14addf0485dda71227d95592b2ff9d4abdf11f3da3edcae2f778d43fbeb1fbb8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAUM72000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc7666204ec695a7b0220848eb8a990f09eee7283f3d983952e3385adbe28c6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:03:53Z), 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/CAUM72100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6784560be916a5965bf84a47f719130102e0f3e2a62bc373df39311ce7635930. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAUM72100184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dbc3d6e08f7ffd506e89c581f27432756e73fd563142e144f13e6cb9a1291f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:59Z), 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/CAUM72200433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25604bbd29a03e7bb02dc6914d50056d7151ea60facab6b115c321f56ce56c8b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAUM72200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab87f9db5253f24e569d20c99dc4459d3e3adf83fe768eff3798a71e3ca41af9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAUM72000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba91f6518ff7b70757f39dbb8ad39898e8bcefc492260b4b2197d6dadcc9a0fe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ22D2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba91f6518ff7b70757f39dbb8ad39898e8bcefc492260b4b2197d6dadcc9a0fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ22D2400034.