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 0x0c2881e960cef48fc5b98ca162719e5a9d0e25ec561475dd0f3e2c96bd925ce8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b28ca5a2-fdf8-4ed6-adfa-158bcfa1af76.json and https://artists.proofprofile.net/proofs/artist/b28ca5a2-fdf8-4ed6-adfa-158bcfa1af76.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 0x20ad8d265c36ab722fd8d67f0fba2f4afb564178632f658f8cd4d060d3fbf35e. 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/GBRKQ2038155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb66f237908183b5c11a9aa99c7b0afb73c69620fe7b81766f7e963eec13105. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBRKQ2038113.
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 0x01689268be9f122347decd6cec59e6ae5c38abee0a9512c40af7d528d053d70d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBRKQ2038121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e8862ec352bfe0ff13eda7afff9ff337c2e0e95655e82ef19acf56dcda1a8. 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/GBRKQ2038122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe124d92b7edb881ff6fad176d4b469ab3a550d86a3f2263103d079a256babd0e. 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/GBRKQ2038129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22211145ce63331f0285e6103e95c7f93d5ee2aa5749520541006b6cefce772d. 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/GBRKQ2038140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989d040b06f8e33271bff00febd2345c58b21a1240656fbca52b369e04a785f. 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/GBRKQ2038147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd229478165132fb4b9bcd62d53fec4a59fe5721864192d8b78506a83a572d2f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBRKQ2038152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02436f8c2480a16f3b73083bafa11b3dc8b304430d7b6d2aaf546acb2d8e32. 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/GBKPL1959382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966d53be3a45ddc8908cfef8d00ad4141913e94ef3a7897bb5cb7edf647c22a3. 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/GBKPL1957464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f06c1d2aaf70095376d37ec94da7fd1175d38319707e875996c9a5abc3eee6a. 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/GBKPL1957279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986c65c5dfae7d28dba6a518722939d58d6dcfe79169befa7e02a843f39693e3. 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/GBKPL1959383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e505a4b0e01a1dd8d766c7586a40672be465dc81a30039f780ba7de0ae572. 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/GBKPL1959388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163dc1b61a1c0e125afadfb1910e99ed156322f4d2ccff0ab8a7c06f33417ca6. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/GBKPL1959385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e97a91c59b88f662f54a2cfdf0c9f7a7d5cacc2d60f96bb6d10d7a1ccdf0b. 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/GBKPL1957457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bc78ea4c2fbaee27566d087a7d9c827787db75ecfbe7e136e0db6fe877334. 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/GBKPL1957458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d5cfbc087c02c0d2693490e83c2d61259087d728c05fb3147eaf1a926c47d. 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/GBKPL1959386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58af3926fa8285078aa9ebcd0a7b4f084d29ecda87e6e9c1c924c2f1b30c82b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKPL1959384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c57bd1078e5911e8ababf4899a804b2374334d5971bca65cfc878649303a0b. 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/GBKPL1959387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23124181c14ad6fc5b412396fa156c6e4aa7775db05e37082737197d90408c36. 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/TCACZ1748401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740258152ceba22ab3a272fcbea441452aee2f9eeda12777382ad42d0a7d37e0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACZ1748404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5263406a3e19f9a61b5ae7aa1fe91f800710faf9c598c00cf37ff4dea6256e8. 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/TCACZ1748405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5410b55f0ca2b52241b66496bc9a6988c2d0f9ffd8e9e83e591a82c90ecb1. 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/TCACZ1748406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21342145b85055e358878e10895f32a44181655659556baeec01bc541de80b3. 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/TCACZ1748408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c49f40858b9f7022962e232487939c8ceea5f3c88e9661cf755be9237fe530. 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/TCACZ1748414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab696124f6d888b05958b3475f3659a9c6a823fc17a21f8eac88e4a2d61e0eb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACZ1748416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a12a852b2e75ce091216c8850b3d5a90e46296a1802fab85e534912e1351e. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/TCACZ1748407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d88ed1390291443456f2c09d704c26c7d946c1ce884c816ec8939d3b16674. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCACZ1748409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486e7f55cceffee2e1d90840184548883185318a3d89ae663ddbca92fc7901a8. 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/TCACZ1748412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4115d4f2eefff7b805196d460d3f0c7f2a7da4cdb868429610ad4f92b822fd2d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCACZ1748413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc084a8ae32c53ecb47b374be10192b127dc1f9ad70aa412a463c5bd29d5e4f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCACZ1748415.