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 0xf8a1b593fe84d4f6b3344e0975ee6301da62e5f7744ae24b07f3fdd06cbbbfd1. 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/b8a4f7c1-d6ab-4be0-a39c-73ee5ad5a138.json and https://artists.proofprofile.net/proofs/artist/b8a4f7c1-d6ab-4be0-a39c-73ee5ad5a138.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 0x3cf61263c5b531a1de876acd142bd1bec1ce98717fe4765d1c14464aa070e136. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5ZV1901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791bb8733517574a27983d3c6e7eedbd2d7a52f9ef7a53611b167364fce963b. 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/SE5ZV2113801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf851eab4a4306bc518725dacf4b9bb1abb0998e080a6dbd8fbfed64789269d57. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:55Z), 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/QZ5FN2314772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b51e9fa05e585cbaedec81f0f294a12bd99ef634c1ad8e5ad0458436d9ad73. 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/QZ5FN2314797.
Hiding (Jakob Lindhagen and Vargkvint Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35121536361beb0ef32440877f660e1bb004730a5b76b603cb6b49d424cd9bf0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5ZV2323801.
We Made the Snow Fly Upwards - Elegy for Jane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc440f7a2b21730ff827d03aac09c6b4df0857f73ffbd6b9a6c29d42c8a5e3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:28:30Z), 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/QM4TW2428116.
He Told Me He Loved Me Every Day for Forty Years - Elegy for Colin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242315ea235152daa1a7c272f43ba79a6e48acb0525cb56cfa642dc8ef202860. 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/GBWMY2401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699265ba1afe08a08e5ed6050164171f616429ff798f49eb22a2918fbc41a9c1. 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/DES382503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0252d6dc2a591e8305153655f8431d75783bcceff4570f2fc28e3540a85cba14. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:38:43Z), 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/DES382503004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e15aecdb24253cfcf30b053bb8aa74e5a33bd3ef964f8b84b286ab04cb0de. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DES382503011.
Sad Waltz at Monserrate Palace (Garreth Broke Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc98b4ba5895f85cbe34b34401625161678f218656fac2a0e1c4e743b35f331e. 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/QMFMF2333328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a185ae769655165ad231404f85a710b22b4cd9037eb465a7cacafff1a052fb. 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/GBWMY2050200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b369fcfe2110c990455a532da463dff498ad4240560a88a05e5bbce27cb403. 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/QZZ8A2407941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ccfccd36f8936326d760ef3cbd78883e7671457e38562aefab5d3193cff426. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBWMY2050720.
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 0x5113c54e43284f15886a23e66ab316089768714fc87ea195056c1bd801833938. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DES382346012.