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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 0x82ed1bffe1dca8421874df9be415634ad9a8f466d18a32bed499aa1d90bae769. 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/26004c0c-66ef-4da7-959d-8d5f53599c6c.json and https://artists.proofprofile.net/proofs/artist/26004c0c-66ef-4da7-959d-8d5f53599c6c.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 0x5d90305a03eb96da646df663cd160973ed1207f84cb4b72297e01033595d1b0e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BCEN02000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce1792584e39d28b80dffcd9779daf810ccb9f308982e834583f4238d6fb27. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BCEN02000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf1304d641930cdf8fbabc6520ab639b3facf3b042388b3f8a0c8887546276. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCEN02200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba83824ea5f3a99b8aa0fba97631c5cc963715c0d14653d3e3efacce45d3b58. 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/BCEN02200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dce1792584e39d28b80dffcd9779daf810ccb9f308982e834583f4238d6fb27. 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/BCEN02000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84d47e7c9da25219099dfdcc09e416bb22dd34fe1a21e43e964925efcd2668b. 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/QZHN42249863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f598c17283fc3bccc6f2110cd8ca993c1659239d03fcd4ade637c77795a445. 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/QZTAZ2388083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb033d0f81f900f2dcbd39e14b5e5d5f2b2d7b64f14b8d188810fde36ce49cdd. 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/QZTAZ2388084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad87896f6060f5bbf19193794ae78262aa4b1607123a3ed95c572520152d1da. 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/QZTAZ2388085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b050fd9394a5078738b6c69f15e544bbe62dd846c13f14acc39d75ab17bb366. 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/QZTAZ2388086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213e61ff0f94e049b350f81e5e71081c8866244f86f6868c167245c95bcc673. 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/QZDA82393545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ecc8f7330cf32402f71d366f4a1b7a42e38073632d45dffc03bff18566099d. 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/QZTAZ2388087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753b3a343294c725274e2617b960dad57ceb5cee57191f90090a9b191d7292b8. 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/QZTAZ2388088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8eef8e2be26deaa5c7e9ae20787087f7f2add1f6833f1050a0e13b4737cbd9. 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/QZTAZ2388089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93821bb15dff4c13884bd181177eae53824090f3c759a6cac2ec2603863c030d. 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/QZTAZ2388090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c823348d9eac1f370862d5266c8d8ad4af583b61ff6bd3fdea91d4e69d610a4. 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/BCDGA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f46a944875ba8edb284413e7bf7bd5a7a4dd7cae66f17e1a1afa67c4e5076. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BCDGA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63e172f7598ae6023d99629101e0bbcfdfd43392408962abb2950135d717f1. 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/BR7HL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f7035ba036bd24acf185e336f762bd76bd7b485f017853944ea6fa25228956. 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/BR7HL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4550b2e6105aeb3892a8dc2fa1a6fe06880bddc487f1d4ed56b85341e36bfaa7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BR7HL2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf692a176207b42cd628a8d2e0ca66f92e6e8f4c0e9d47f3062061ec3832e4e9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BR7HL2300002.
Driveways to the Sun: At The Green Flash
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa579b9b86110371a252f9b5801aab9b2d062afe6ab49adf8100cb21f4d9377a2. 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/BX6IQ2400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25bcb4940f97882b97ee70813b05e99f5244deabd09bee9eb76d772c454c19. 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/BX6IQ2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06110ddca2695c6db0177c5b89db1cb49d2c4e6570711b6c933c02c2e025028. 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/BCBL92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde564e4d2825a07d3745e588eb8fb64344f0c8b098b1080dce6f090b0316bd7f. 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/BCBL92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7bdd11b37d3204994fb8f21dcc17e891ef68008f144f337db757604007f03. 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/BCBL92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7025a1ce40b82320fb9613ff4a5c5fa972e0f24755698b01269195a746966b55. 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/BCBL92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f533af0967db60a0e8adce7eaaa377951dbf2ae967e036e317d21145a66380e. 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/BCBL92400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f46a944875ba8edb284413e7bf7bd5a7a4dd7cae66f17e1a1afa67c4e5076. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BCDGA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11853595c70048581bcea480642c981898b6f19abaacb98fda388f474d63ae36. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCGY22200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a861ceff9600f4c51f8edf1f28230236163b6d78f868ab33e786cf9caf5ead7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BCGY22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e407b222eefa7f6428365414e9fe8bfa5f967f807682d79361c61b5d32f3ad. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCGY22200007.