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 0x15801bb0a4cf5b5fb3180404863887d337aab5e326e620ef552567fd11db56c5. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6729da5-701c-44d0-a2a5-5d83cf85887f.json and https://artists.proofprofile.net/proofs/artist/b6729da5-701c-44d0-a2a5-5d83cf85887f.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 0xabe0520a1fa2d81ac7374a0dc746da104b9f268058f0106c99b03d7e2093faa3. 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/FR59R1829231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d9246dc46b4335b88216b2c3a82e4c1fe11382b7568badf69873c0c17f727. 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/FR59R1829232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafacab434e7b0309d91363acfde64b0c182cde3f8631d247a32d899f5263b52. 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/FR59R1829233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858990f4e57de64865537c56ab3561f49e7c416da6e16dfa3134326a8a6e0270. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR59R1829236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f7346b18644b96fd58301c4b1d2778b3113b73239e1003d836907e9e960d0c. 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/FR59R1829237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5066769acaaa9317554108f3290a2014deb3cc33ea5c5c13c875a47cf3f7967. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR59R1829229.
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 0xc39f91d82b854b2e0149a3fc2dc7bd07326522242142e7eabd5c1d00ad5e6463. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR59R1829230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136064f890bca17a0805c58707b90550242624a3897e47e3c5902f603f101757. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR59R1829234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c02571401674f97dc55e380c403bdcd9d96439680f1e729e160ee9d2f5d108. 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/FR59R1829235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27349161429efdc25317e198869615fb96b05c90ca3023b8371935ee440a24b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR59R1829238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73e12536c76ed3f3b1ee19e7ce50f6fbeeee3979c4ae6f7045f82885c61ed1. 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/ESA031504110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80128c5ccfaf8e74581f7f57cc2b2db50306c61418f5c1fb2b974b95ea031812. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ESA031504101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d614dd41165dc4888ecd2896fc73164c392deae896307aa3fc10ae6a9a76d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ESA031504102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26736cd32237be3193c961cb0278d95a41700a749b9c30e7c361a674a2eacddc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ESA031504103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592018ced94e75e11cb00366e449eefbdb6c6f103d3492ee87d298a44691b907. 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/ESA031504104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697f2908502bc333d454ecc5ee6b0fcd79b0b8f741b1c1a54bf217fa03e6605a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ESA031504106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0debd0d3e62ab97d1b3b24be8e87ec539e07a34a055165e854d69386cd3977ff. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ESA031504107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f805fdd8dca19f5b35f3cc6e9bfd91247fddee2e5913b8ca47fbcff2f200867. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ESA031504108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd116b51345044072efdabb319468e47c81c3b027566f64a0883a97feb7eca9e0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ESA031504109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c085316183e1aeb9350c7bde0de2f9cea62868c1ef730c0901a7f7c15ae97ac. 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/ESA031504112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fa0cd2ef7f0c48276820c6c7b721440052ba74a016a3b5875250ad1f8107ec. 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/ESA092322148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10471d2d4edc56c2040633be21be950cca01562a432de0bb4aeb694d8580fb8d. 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/ESA092308957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f007cf1ba355fcd75610c521c7b93f35ea8dcfed43f47e58968481b3d90482. 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/ESA092200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b979fa547045d6fc7156b8428087d559ec6df07a67bd93e9018dfc99e0b7e. 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/ESA012206719.