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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996897fec0df2fd4bb0b8fb8a9b8414a2da7b40bad5e2372fc343a2e044ae211. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/271902bc-96e1-4698-adef-dc3dac0c7966.json and https://artists.proofprofile.net/proofs/artist/271902bc-96e1-4698-adef-dc3dac0c7966.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3bd96509ba9a5da13097c87fdc11eaed6d571f860ff2c18e9c188aa3357f7. 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/QZPJ32304875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322dd52f628e200fd08274af0a12ab9f376a012ab6482d9382033106879c2a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPJ32304876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2a51e18dd8f5dd8ab616dfb7bf8a92b05679dfc8eb5eafb15953bff1a35cb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZPJ32304877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b86db1a2ee679a33e0b03efd9b5ca82889fa3d492ef2deb94618d8fb77e70fc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZPJ32304878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf8b5fa44ca1f56f9ecd3c992d8abff3c55e6c13860f4b0a264660d2a5ca8d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZPJ32366605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d136a2bc74c7e085b4d19f0961c403154dbdba6102f035efece428fdf8fe59. 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/QZPJ32373428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec625ecb9e12ae20cb0bbf665b25bcb3201862b81a9505c6c5f1e77a3293611b. 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/QZPJ32382805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea339d5327a4923354e33cd472f130c54c07297035b7f3d84bd5d5c84ceb3a41. 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/MXD782402578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13593f84e0f646e33e441e1c3b262ef1f2d0132789dcd0901ba347354b6c85a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAIY2487383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131ce99b1178f064b0d6f2dd178276b4c2a772499e0af3fc768b39e426208dd3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXD782403258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2ebd8bf345b64948e9b877a548310061e75e55144387b33125c6cca3d8dac. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/MXD782403256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef46378cf0a0eb2118467948182b1c99af3da62e754467f358659a4ad8f9d69. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/MXD782403262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc271168b3622472ab5b959c2521176dda03b5f7ddd6039693b42ad7605ca293. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/MXD782403257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011514e0adc76f62051b3a5b6d06f53e66118e75986e1d65971622e92923b733. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/MXD782403255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511048f58d2f5a8dd76e5c591d017b798911e170f5ef034e593bedf3440b6421. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MXD782403253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579fe25cc8ef48808f9ee9f0d87c7b94c0460f6dca9fb8ca1773a839248a802. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/MXD782403260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4310f0a9c1fa6d852bed3fd4365a55c59585334dc9e24e3a444e38b5a4100232. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXD782403254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2ade1a2c5296f5e5448d0036b3863d2be231dd6b3a6faf5bd83ce0204dc1e5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXD782403259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9315e5e6ff8edf52672b22847f1d119f3fd960ad7176fcc309a784709519d424. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/MXD782403261.