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 0xd264c87f94ba79e82f34f0c6a7e1e3cb3618bc897393f85fa71b477d7035f6da. 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/57775dbe-a40e-4289-a2e3-e8fc68025d43.json and https://artists.proofprofile.net/proofs/artist/57775dbe-a40e-4289-a2e3-e8fc68025d43.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 0x1cc824598699a817b916cac4870e132a122be4215b21530a50c0398ae6ab8341. 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/SE6XW2335494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2704e9bbc78b3adf61abf979a8df988cc60769a4e27f9a53eacd3c0c34bbdb8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE62M2370150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82479fd1eb9f0c8f2f512b7a02114fc20072a45fbe87958a56f16e200456ec9. 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/UKZGC2403872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbaeb25894b86f17df282823ede38d441948492306ae7a5b155aaf695e299ef. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/US3DF2472385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e67aacf2b9927b72d9dbee6cf070878667fba458887880debeee44aadce4b6. 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/UKZGC2404887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93bd275f17ab4f079c727ac20042c3998d1d7bd9e69df20e29d93733b74a729. 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/US3DF2480663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4d6e8fb2e9902ddd1fde3ccea126be67b2ff3707ee2e6dd83d10a37dfc07e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT2VB2419293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4c358412d0a03ea3854d95f8832153ee568b643c8eedc59e544cd02f5dae35. 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/UKZGC2408465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30b061949f701fa6e00a3c921af78ab7ee07295a27f7248c85c4987203c8b51. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT2VB2444958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ac03da779419ea3dd48a2fb1a6e1c29d4c2373e79c558b6ab20ebe14e39c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3DF2514063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed1d3c97e59e302fba6b9a816a7370fec93995e561ab98ca9f010db24d920b0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2547851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c93a0ed5179baf39523131e2d15044711ea7cf090f03e62b0ce41c587ce6d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/USANG2501097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75052d00441c491ac268c1bd04cdba1eb4ba80a7cbc153a8afc55b0e33fbebdb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USANG2505282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acceeee2d68e64ca6d5d4885651b18833b47847b85568c9487524d60e9168d4. 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/US3DF2437738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d8e0a5f88d9809ac7ed07fabb8b36ed4c98665376559eb4789dfb88ca171d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKZGC2408495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c2877298dccb36df0d6ef44bab45ac96fb234d675457056268860b82a06ba. 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/US3DF2493535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8af9e08f28858b9ee912a7d5e83a57c85ae6624bb7b3fc09322b3a48c529dc. 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/QZHN32458265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4d6e8fb2e9902ddd1fde3ccea126be67b2ff3707ee2e6dd83d10a37dfc07e. 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/QT2VB2419293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d8e0a5f88d9809ac7ed07fabb8b36ed4c98665376559eb4789dfb88ca171d. 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/UKZGC2408495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d0dacc207b23452f99db2964589216b031ffda455f64296200b725bb81efcf. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3DF2459704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258f3c64accc4be0ebc95c29ba7e5029b792ecaa7b2689b24e56da7ffaf0460a. 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/US3DF2459705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaa6fa4cc888d99afa17289c7cc321f2b7a78077f884cff182a6ea9d8e9fcd3. 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/US3DF2459707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eec9c4d6791c476e814343a2253c71648ef1d6eb541582f8889a89ee5ef6601. 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/US3DF2459708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c170de233ac3066d7a92c707bd53297af6b2da85a8f7ae3c067077da935d21. 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/US3DF2459709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ecf8933f375dad5518c85eca1ee83313e3ca1d8709d1a9643a6db51ccaeca2. 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/US3DF2459710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be7237621508d255fbb2359da850fa5ed4507ca46fa4eacf9f17008bf550dfe. 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/US3DF2459703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a95fb4bbf5c87c8ba0e3bc38f2c387372854699cb96c409c8d41b73f211d7f. 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/US3DF2459702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b81296c42f10cd74ac07caf597f83c982c57757c4dba09194bf46b81df54a. 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/US3DF2459700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1635b2b4d6898bba71b4f66201d8acf1a2097de643b07c70c746dd0d0dfd734. 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/US3DF2433457.