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 0x598c703966c2a796d7574cb1d84eb57c3be0fce01a122a8e93485681cbfc58d2. 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/5a4d8606-57e9-46f0-972f-9556c638300f.json and https://artists.proofprofile.net/proofs/artist/5a4d8606-57e9-46f0-972f-9556c638300f.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 0x2fb567fcaadf854d7a082984a739887ed211822a7c15a2192e98fa289b2f53bc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ61929085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b33fb456d65b9c5681b98b1ea72fe989f9eb0b953eec1ecffecc0fce69e657. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFZ72001663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9accda2f455255e0a7836dbcdd0c186994bc14df0dd99394209e692237256af9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:33Z), 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/BGA672128102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b230fab7837d52a2c437614347feec8c3b82534e6ca22286e91e3f829a4f71. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA672128103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09de9bd8fe684872e3961a4d00c66fd210421400eb82f9139a8ec1deaa6652f6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BGA672128105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a14fb73c7f656357f1e993d7cdcb3c4ba6bef9c58dad37a5e00e873fe600f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA672128110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c638b5c9d742a98d06e8afe26eb76c15954a2c7dbd85322aaeb42ba9c3a46b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BGA672128111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f61eea197c20353523782895c4ec4ed20e26aeebd979c13e57104e68bc66d76. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:57:48Z), 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/BGA262269463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc316a52bde6b365241bb361bb16e2740e695998ff3a47db245b809a3c0db65a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BGA262269155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db133acc693ce1ed7d4e09b43616ba4298f644e9df2a405bf1b02188a5cd457. 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/BGA262228192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265b43b79e855846950dfb2c0f1bb9cec53d609ae57599cc1a1ad20403485020. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BGA262443501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70bed30a8effa51959b739a5702b90e6e9113720057df24eba940dc9cc200d8. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/BGA262489405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7bbd62450cd82f98b4ceea2222dafbf81417e0864553d693a69ae077e94da5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:32Z), 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/BGA672393501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63810962b244d3ca89ce3f4f188047a77e09ab2de964f7f78167eaa57977e249. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BGA262489408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f2459582ef8b08d69881d37fe6b0279bd3b513eb4b2388acfc155699e70acc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BGA262404719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a16c7f8c64a4cdb77aa16cf9b6e7eb97860e179e14f36f5424e648062a93d6f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:09Z), 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/BGA262489411.