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 0x33dfeb6ee780ef00fdfc90a464670cd85a034b64619bab9b161686954d0dbf56. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dd26b35-6524-43ed-82d0-93ed4c64a9ed.json and https://artists.proofprofile.net/proofs/artist/3dd26b35-6524-43ed-82d0-93ed4c64a9ed.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 0xd6e00dcd1d01a37ecc98c153ab0aaf57f07d9a5f7e7f0f3e4f54ea16023e30a9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAU2151009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dff227dde7b134bb6a992702c89cb351946ed058b971a69087f7193a451404. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ42207228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170d133da645a74d0ce774515b78728f5a1b579dc79f7fb18c7e7d84a848c89d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2339108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78019bc7c79d7ea3acbcbb1c83987c33044b22eed6a880c8403b41fc2cf597b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYZ2339112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cca56037c501f9061479b8fbd45f9ae1736265404a59c038a0d1f9681b2aae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES92384564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716e019c09e5191e4dd821ea24c940c39a80857861ff6700c8653e185aa5bdb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:28Z), 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/QZES92384566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5460bff975857ea0f28781dcbeb1bea9b669dfa57a399b974e8221e109f4962. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:21Z), 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/QZES92384567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f88c2127ca1ca11a8bfdb451a0029a0cf6fa733d7e71c2b5c8ad2c58d1cb4e7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES92384568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fdefd8dacce423aaabb71f8e4c5940027555e51cd92f9c648f1347cc4f1b1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES92384569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fe9a4027f2b3ccf80813057b124667fbd00b58be5f5efef4ab4846031bc31b. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/HUA612302736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841e73af33ca246c8bc5e43e299c9ccdebc34313c87c573d75dd0c4472bb127. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:49Z), 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/HUA612302996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711beaf4ac9690ed915cfc959bfbd515e80d64300e1fe4885eca8813f894bfd3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/HUA612303641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52eb64424eb5a0f3ddd11d1a785090d117780f612747d974cad353d57365224. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUA612303642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a78b0a66b43b9e3965f5028046c8f59647508f1c74c5e2ad051dee0fda5e83c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HUA612401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78c7531019e718dcb3759eb2bc196e3ed40a9d2ffcebf9e0e8820f47e19664d. 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/HUA612401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6cfc6131daadb0bacb6f8153d010232189b91f35b43ca25428d0dee9bfa07. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA612401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95e7967fb6b4e4ae84b5364471fb74d09b50e02fc6d0bceec988d3356925b0b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:49Z), 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/HUA612401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424e191c1c942455e14770bca0a7ef57c0d246471788b36d208e2ad43bb3e45c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUA612402117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899a6da63a395dcb1335d25401a44b4b4dcb2f1c5ed40bd024c494ed7c1dab37. 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/HUA612403706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e151313add0d05be2480f22b1ff72d1213506668049e48620753d3678f8a2e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA612404194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6af0cc4244ff13df8ee51438fbb0fc0d9c5069429d0df44593d8201946f02e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA612500613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d748c5133309193b12e1c8be7ca7a1cc412e0c24b303262e5842464e8e051d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HUA612500614.