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 0x2b599138dcc738c7cfc6576fde4ed6a71948aecf86ea569972d318a9564288b1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c7dfba1-f067-4846-8cc5-ec5289ff629c.json and https://artists.proofprofile.net/proofs/artist/6c7dfba1-f067-4846-8cc5-ec5289ff629c.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 0xcd13c7d062bdc729b3cdf03eb984e7c355df9ef2f5c20174f0a930a140a03d4e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INS9W2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ea7d05628e6ecbe51cb7a420555cf1a69df8a7b0fc91a265dae067d9f60b1. 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/INS9W2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecab4e84cf91bde8a3781aca10aac636d904de96fda4f1748221d6bd194716e8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INS9W2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff9721d8382739d5f3f6db5451611a10622ce7a890ae7b75b45493f20f01381. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INS9W2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112cff92b1f7a9f1683489dd156a50d5b362b779c8e58ab1159b1b5c1d7f10c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/INS9W2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98099444bff6071f967b6661d38997fcc13cf68d1de439b598ce2679b7320560. 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/INS9W2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e4ec358ac1d41ff8a25f6ff891a4059a31d41191f83d3ef5b695bb34a70fc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/INS9W2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41012766cf365406180777e32c2e92b4c9152de80ce1bda7ff2e122bda821bf3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:21Z), 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/INS9W2200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90be2c02a43e16468a0fdedaefa564db1ccf0680efe032a9d0e8d28aed3667ff. 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/INS9W2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bb902fd1367ad736aea32a258c30c0e334bc9dd3f137270873a6d95134704. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/INS9W2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d72b23ef67eba988408fae0007f3943202ac74f80fd0e7278cb8156709ed55a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INS9W2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315593b60b60c3e30aab5126c2800b5218818e869ab746135b17ef60e69ac567. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/INS9W2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d55e654f936c1c1462c6f98f07ff48e6b20d59edf997b7218bb1149fda37443. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INS9W2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac2d4a242502fb1acb29f159bb79204c12d37adb226b4712546e390cc5a8e7b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INS9W2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24619fdca8b1ebad5a4bfbae69f4986287bdfcd5405e9d8cdc2038f9b5a4506f. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/INS9W2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0b5a7575f4105b9e81a6b50a7c97751caa1d31051ded8720947a9d59c128f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INS9W2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea19d9fc4fe31b7aa23bbebfc56a95443f245fc2bd29475da44a30a268d2ef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INS9W2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126299e6db9ff0e447bae9e6a2e1040aad97c797b25d01863e85d2cee29a2af. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/INS9W2200147.