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 0xd8bdbbbb9cc56cae1bc520ec7a972f981a7c20af797422dec468d7e52563a4f8. 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/3a7d680f-b057-48d5-a17f-287dee6fb309.json and https://artists.proofprofile.net/proofs/artist/3a7d680f-b057-48d5-a17f-287dee6fb309.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 0xdf09ccad76a3d139e154e43d852038fd611c2d739a5ef22928aec11561646a64. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:40Z), 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/ES71G1632571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd3e4f761cfe65c328960360070f996c1c4b010160746c835cce37db0bd8e75. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/BR0121600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83449bb198d607cae80266842300d50a248a301f88354a267f6deeab7ba2473e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BR0121600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c3b92c256823ec8b179597683d2e6332898cbedb8fca97954993e235d40c21. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/BR0121600026.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808375fb2bf21ef24c36c88d2eb3d059a98dfd9d091b78bc3cc5202393906e29. 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/BR0121600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0167ce5650b074bcf9ac2b7289f9c221f5618f9c936df86f0e3eca61dd4d5509. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BR03D1700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db3fe803671d55754d728801a7d6c88329baa6145a3516dadbf128a739cbd2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BR03D1700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e9334bde02db608866b36e0a3d48e52f323381ab84914bcebc843f383c023b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BR03D1700406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d498ec078dcff4903255921046ae798539185664fd47f958475f7f0fa82f6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BR03D1700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70cd08e2caba00fd7454e873a268130ea54b283dac7c37163d0f2bb330c064d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:54:49Z), 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/BR03D1700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46658ef262bf77e7d8df20ae281179218bcd63ef74420582e4cf450f5d6212e3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BR03D1700410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597fe7358f5da4c0dc6c95a72e0106c4ef24b179d40be8cc8ee14e7b8cd20395. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:48:44Z), 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/BR03D1700411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2073ac334efc3baedc366bf649efdf7d8b8dbe715498aaabfbfec921a43000. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BR0122200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33940ef071d916f5b1a5b9c7bdaafec137a30628023dfb4338da28406f69fb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BR0122200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b275bc2dab706d63f1bd4b5fe83eb2bb0bb795ac2b92a40795dd8b266021bc0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BR0122200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c44e2e79ba830682e0c32072229e26e110a1eed5bd002d6abc9b7a4ba9dc2f9. 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/BR0122200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218087f3c3ae3d5697754be47350389238d067691a8f61b41119dc4c094b850a. 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/BX4TA2000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da971855a52c3655ac5a58666d9676f4614f284cb5f6020fad7de57a933d53f. 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/BRSC41400065.