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 0xbc249bf5dfb30ed09e5829afa707a51408d70c12d6529ab039541ad08fe41dfb. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/000cefbb-140a-4bc9-a69b-c3ad48f26edb.json and https://artists.proofprofile.net/proofs/artist/000cefbb-140a-4bc9-a69b-c3ad48f26edb.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 0x083dbc2178e684a5ebecb00327124b1a92be0ac1cda90e7092b0f5a64804a799. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM22081331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e805c037050488d0d77f8fc22408ce1f64bdbac6abaafa490dd7910bbcaa20. 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/USHM22081332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd38aa5a7e27b9073419abcc367ecb3f0ea006b3073c3a29a733c596750a46e. 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/USHM22081341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe799c1f8cba892290b2a530ad1421aa65569f7065b6c9b8ab3b281af264c002e. 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/USHM22081342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3eb856c37b3ebdbbff7c797bc3d8f444e2701f5d083fe9e6b809e31e2b508. 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/QZNWW2240787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073597f37007fef571fb8c484738bbe87a3e2b6aa1e1f5674b448d8ebb6a43df. 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/QZNWW2240788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b113f2ef226d950bc3ed9e46bf9bea0ca5e8f8802f80b471740a561c3db36d. 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/QZNWW2240789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866479277fe42b627ec9c21cce8495d8420f6f9c5ba3ea6865d0e41f156e4f61. 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/QZNWW2240790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7341d62036388a36c4b40cab5aba2a48bd028d18e07b0de4c2443ce764317009. 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/QZNWR2263753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfee9dc496a73252f1d244981168f45167a276a1e77e1a37a195d64b510bb12f. 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/QZNWW2240791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebbca8251cc617c6c156cf5d629ff2b357b9d26d542b730e0b7af80920d26b9. 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/QZNWW2240792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7341d62036388a36c4b40cab5aba2a48bd028d18e07b0de4c2443ce764317009. 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/QZNWR2263753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276bc7e2fe52ba16a41d618621a0b7176c751812f5ede145656b3db95255dd5e. 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/QZ22B2058364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b0140c4b5983492d752a3bf3bc636ba3fc4fd4fed3197a8faa94eddc4b2287. 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/QZ22B2058365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6104f7e62a497ce0e34aea1da50f4a2d99fbd93fa13e87c764d72bbb89c80c. 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/QM4TW2538825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158847ddd361bb5adcbaa1d8d98d584963ffbe505a7801b88d52c2c8e638e6c6. 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/QZZ7M2422101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e40cca1f168624feee62af4c6c2912600344f5df92fd33037fbfb57113c120d. 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/QMDA62469648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226c551ce3ee0108a969fe7d331b3b7582106a7f067f834e512cc808aa7c5dc1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMDA62469659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c884cdc3f693548c971a8261b4619ee5cbe3725618a2d3f042ab30664f2cbe4. 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/QMBZ92474131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d4e76fc2dae9f79fba0bcda13b51af5bfee7f47c619187c18bf8902bbb2ef3. 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/QM6P42440596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c360cb5ffbd92973d2a88979c3828f4e04204d8289d90bd12a0412cf25463. 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/QM6N22485499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c0bd97402d1aa4c22f786586a1424bd488895c0e9512a6fd67561272e1d10a. 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/ESA092316077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be2a2dbc39a51fd78ad39a2dae2d425637778dafdd4dfabeeb08d81aa2cb9c1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GX3Q92394792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4e5670a6cd33df389fa306a675b0efd7235a3d6fe7706af0eb762cd1ce2f9a. 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/QM6MZ2225120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd349567aa8e63a8cd68d9bc9dc3789d32928ba74d8d145568287ca7b1c94c16. 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/QM4TX2228278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad48f88b24d80dc4bdd83678947059dbd1ae7fa5b023c72cc534977f936a97a7. 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/TCAEJ1903716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd184ec5d957285f54f0f12b29fab443fe41bbc5f99333225b4646a830f618333. 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/ES5022302043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7db659304d42939ab330452ae8197c683bddde6fae86905af838d69e6df7a. 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/ES5022302044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf5587c10c869a94eebd3c93c3c77823d34c4ddb9d29bc23385a145aef111a. 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/QZ5FN2020495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f9ea9f95e8d15360e4d97235f8815114311377375b256ae6f3f26ed4d5327. 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/USHM22295501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dbd5ea0692569bba7958d6673310eaf3c63dc23fa01c50986dd3da52dd8b55. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES64E2201929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b5d17b9b47acf56e1ad841bffc0ae2ce0f707088ee13e30e34c99cafdd3e8c. 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/ES64E2201930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ce6ca5519ae4955632a0ad50334eca14121ed1764e2c1ec6bc5b05bbe776a0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES64E2201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84548d3a652fe6461072490654f8515acaebe8eb9bbcc2f605a98e382d4ddb47. 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/ES64E2201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0187b3410043b66f8951848a3a69f1c0b1066a25b3b05f03834476b5251bcfa6. 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/ESA011841784.