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 0x79fc0b383f38e401dc1fd81ee0b13a2a2b3e32ff56ea9f5f7820b496ccfb38a8. 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/9013fb31-6e88-46cc-aa42-173b7c9e04ab.json and https://artists.proofprofile.net/proofs/artist/9013fb31-6e88-46cc-aa42-173b7c9e04ab.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 0xa0ed1e9f5305beb4a3b2801167f7367e493a853c69684c0b92d6ac769d75d93a. 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/SE25W2200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e91166c1582ebdeff98454bffe42d7b4fe17bed433b0e1eeb44b6341f0f9cd. 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/SE25W2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e764e3515c465f20f0de31a04f86a56b74a4907d520f537caff59b0290f3d. 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/SE25W2101601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756aca0f3f1646b78a5f30ada9d959f59b540b72797d91174774c25091651b61. 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/SE25W2201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb274e2ce277725ab38a88c34b0c32280c846842ac39cb3a4bab4fd5bf6bb1562. 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/SE25W2101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130b1a5a3e8f4eec1e3c3ce956d95e3f6d044c10c4f1a16a2dcd5b861c54f761. 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/SE25W2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2721caa85f698c7bd2aeae6ad3e0a8c0477f7b38a7339d698bbb63c9fb44ad. 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/SE25W2201601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20de78744c0be04a737c8f30052fb40f90d7459b45c248484e3aec131c8872fa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZRP42281159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1360612c89a0b66dc02c53277c73caf272ebb6f9205df6e2dbb64667c5b799. 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/SE25W2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0068b2853362715681eb40a94b1a55de68678bd768d124c98f482913ff33b1. 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/SE25W2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460397cb408160f23e9efd60fd5e13bfcd9af1231e2fe5fde6c52b749c0bba87. 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/SE25W2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae5bca82eeecfb604e47d463d3aaaf48b60206ff44ba4fba67da9a0dacb218. 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/SE25W2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5db34c8ae4500ed8a45fe238b0da6ed8104c55851e75444f314b63a6713af5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE25W2201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c7a682d24c3315d7a5f19a99ebbf0d93b14915425d92d638c4af177f2d251. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE25W2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950593ed4a7438276dc39f4570f3be7c9d60fb30948bc71f2c9e0177235f28bc. 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/SE25W2201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447567b7aa88172a37547b753e1e5486691a6bf7d3e2bc09cab6cdcf9f89118d. 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/SE25W2402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f6f029d4601effe4b80898bf6a43dd5f5288c187afddd0f66ec61feefcbc3. 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/SE25W2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588bd631832cbcf94f338f189866515c7f60ac13b77754e05dab1e1657dd767e. 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/SE25W2401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e92aee7b53c85563f85f9bd161a1bb05da0f49d9b4d199a48c7a5add5b8df1. 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/SE25W2400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588bd631832cbcf94f338f189866515c7f60ac13b77754e05dab1e1657dd767e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE25W2401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f6f029d4601effe4b80898bf6a43dd5f5288c187afddd0f66ec61feefcbc3. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SE25W2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e92aee7b53c85563f85f9bd161a1bb05da0f49d9b4d199a48c7a5add5b8df1. 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/SE25W2400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f6f029d4601effe4b80898bf6a43dd5f5288c187afddd0f66ec61feefcbc3. 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/SE25W2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82135a1337b310ec35e3c6b55cf6b94eeb7d776c41e828cd9cc9119e1d52388. 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/SE25W2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f6f029d4601effe4b80898bf6a43dd5f5288c187afddd0f66ec61feefcbc3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE25W2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ed1e9f5305beb4a3b2801167f7367e493a853c69684c0b92d6ac769d75d93a. 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/SE25W2200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950593ed4a7438276dc39f4570f3be7c9d60fb30948bc71f2c9e0177235f28bc. 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/SE25W2201801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2721caa85f698c7bd2aeae6ad3e0a8c0477f7b38a7339d698bbb63c9fb44ad. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/SE25W2201601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5db34c8ae4500ed8a45fe238b0da6ed8104c55851e75444f314b63a6713af5. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/SE25W2201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460397cb408160f23e9efd60fd5e13bfcd9af1231e2fe5fde6c52b749c0bba87. 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/SE25W2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae5bca82eeecfb604e47d463d3aaaf48b60206ff44ba4fba67da9a0dacb218. 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/SE25W2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0068b2853362715681eb40a94b1a55de68678bd768d124c98f482913ff33b1. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/SE25W2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c7a682d24c3315d7a5f19a99ebbf0d93b14915425d92d638c4af177f2d251. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE25W2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1360612c89a0b66dc02c53277c73caf272ebb6f9205df6e2dbb64667c5b799. 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/SE25W2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb274e2ce277725ab38a88c34b0c32280c846842ac39cb3a4bab4fd5bf6bb1562. 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/SE25W2101701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e764e3515c465f20f0de31a04f86a56b74a4907d520f537caff59b0290f3d. 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/SE25W2101601.