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 0x0af9900b4ba09c4cedce15b71ff8fc9279a8a9b77ed9df37589542d62b62c2af. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82637643-7878-4a9c-9407-cec01482d090.json and https://artists.proofprofile.net/proofs/artist/82637643-7878-4a9c-9407-cec01482d090.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 0x54d303debf77406ac9478041f83e332c57f1a946a04baca3112259b2555cf094. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0M2304337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d15c0c5449333eb9b5b3286b00257e48a682bbb5901dd61f3e373ddc12610. 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/DGA0M2304338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3edf6b543195560d583c709733a8627c52dc104e03b88c355777c224d67a2. 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/DGA0M2304339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20133f7fe45ccf26c9f904e0fcd3fb2f67810742942464aadb125a63428c9957. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0M2304340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8b7ddd057c2365a30d9fef4a76072521d2a79278eb36a1e85d47eae336bb79. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0M2304341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7cf525f58e07db25a7055e1a329ba98a309604526e4a2a3ace2a86bebd026. 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/DGA0M2304342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ec4bc08e737267a8ec5327afeec99b351a5d3751e73b77c31602d6152cd74. 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/DGA0M2304343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a02b50ea31e8f872a8be823cacc727d865cd4ba875f51ae1947488d766fb53f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0M2304344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956c573487b7558c4008cde3bd487152e38e3fad0a1193a9846301ae9428b07. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG732430592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa836dd8eb41927fc12eecbbbf55b8977ea75de67799253d668663202f3af9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732425265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca593bad9e57d57b58a0ccf48eaacbfc739d7672d6144e1bdedd3d03e38dd0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732425264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c129d769a2e9c319b6e0e93073c159dbb0dd7755f58cb828abaa7e90d163cf6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732425154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bff6fb69893e096d9c3fb323e19b28c4d6dc17febe9bd08e12293000bdf3dc. 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/HKG732284743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13660d1d580c6f566e2b29eb9d5f2f565d12a1214a1a73737bcc9adfa9b25c87. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732283564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57858c55c710aa15cdc5eccb1f2bcad63ad9baa7fc8d3e02318ea47de4eaaa11. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732283560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b5a3d66fbfdad80fb14a4a1d9be5c7b1ab41749fff5b6f8c7d0b6f61f1ccb. 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/HKG732284746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3976c2f03959645255009688f3e5ad94f90f99457d49d17868980c1a25aeade9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732284745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38460af883966f2bf4e2649b33372db4f9ee704c48dbfea461a2d76474173739. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732368183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698f6bc891a79af8cec172c04ec437fcd5571d0b07f18ae78364aa6722ab6985. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732368185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d8be192805cc481dae4a242ed6e5696f47d19c6e1f2e7f7b01f44848c22e7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CNZ502100659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f054974e0dc2150d0e84512dcb6b05b8fd616c829e8f214998fe628ad8256a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ502100658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a817671551e43b605e0b90fa0837683c1ebc871d2914896e3e9c2a38f24bca. 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/CNZ502100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef619b5b1e245dddd22f3a96ba0de88afb2ce310f703fe5ca362223338c65600. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ502100656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681eb195535679c006ec668bf6a28507b92c1af0aa94c92906a3b91c342924d8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CNZ502100650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00b30762b2cfc057d0ec2031481f5a05c4d919d338b67d9047bede5ef8f8da0. 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/CNZ502100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e89efe4a7fb7211066f88fdce1052cdc1c9e5ce00f66ca3e7dcadcf0d3be592. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CNZ502100652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c129d769a2e9c319b6e0e93073c159dbb0dd7755f58cb828abaa7e90d163cf6. 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/HKG732425154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681eb195535679c006ec668bf6a28507b92c1af0aa94c92906a3b91c342924d8. 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/CNZ502100650.