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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 0x79eb685053d796994620060d160f3fdf11845accd9d03e616603f482fc1497ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/230deacf-5053-4374-8c38-c9523e8d2ead.json and https://artists.proofprofile.net/proofs/artist/230deacf-5053-4374-8c38-c9523e8d2ead.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 0x6576278a06b82a78b87de10e0b34f6251328bf3e0408448d80ed80de961e47d6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GRUM72000324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25e1e779e8af89b3f325eab779a24c03ae1677c4c36856d7228204e2988690. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GRUM72000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a80a0517fed107d1350b4c23f6da2d306747871a832e2e9f16513895400f25. 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/GRUM72000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe0fed77c0ef05fcc9d53ee25cdf503598cef961547034274ea4889647d06ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GRUM72000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09a1caf7a4d390f6bca8f4774b9da8d549b20b44ac76360269e798967091d2. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/GRUM72000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc42cb1efe5565af33ce15ef8091a8cfc469e6a20b058f51f3d06f2cd1a931d. 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/GRUM72000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d71fb8161240812039c50b443091161e38288b3942f33f7a011c7a2ed7b4fa. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/GRUM72000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9422c0fa24b199acdf0cd1020bb3a56a5f25ec4bab233b477a40ffd94a2155. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:37Z), 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/GRUM72000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11570d6ca6cf829270b5eed345de54494d85a7c7d9412b6bbcb410973a2b0be4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QM7281846606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d41ab835dcfb1b911820b900c667f69f7f88d0cf430875dc7a06d5ec829ca82. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM6N21954374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd144c52c971a6a747a7f433948982ae88e17bfa30d5ffb14a596476672f42760. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:31:54Z), 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/QM6P41982085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc922f8bfd7519628cf09b10de49b133a051f63542177ca001021f458a285afd. 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/GRUM72000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f26742ec3cc2991c3de94b8762536149f3ebd69ed2a7dca52730b2b5ee36f59. 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/GRUM72000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd344c8f8a592104b2142c6e9398619dcd52d4284edf4bb562a83798f6e509881. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GRUM72000904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8009568724b0bed6c944f73091f08210fe134a3ca005d8b049c1bb4e569293da. 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/GRUM72000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd4025675d19db071a6cc4359f2b8b28058e9eaafe2179c18958ba1c0bfcb4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRUM72000908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cde1bbfe8f033d69e37faa04a0f0861eaa60d3a889f5e0e820923a6609c8f4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GRUM72002085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d9f35869f545a52c3fcc191c742adf01d5c645f87f98a2fc7a94b79acaaeb. 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/GRUM72101939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f68a0cd599fde2189f239b7c3a2430d21be4526dccd048b097ca170d50fd694. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:27Z), 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/GRUM72300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ae75e0298e6514d1828e42918edc241d3f4f4bcfeb3ed4f4546f3b1af5996. 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/GRUM72400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270471f7bcb5b0cb1889e03a7476509bb5f5f9453e032de569d723328d6949c4. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GRUM72400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccd9e2fc01ebc5cdd547ef43d1d7503c78194afa6057b2fafd48cfeecc9eab7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRUM72400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92cf06a7e7756c264c0e396dfa63c752dcdc0347161609cc2b19365c0bd5790. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GRUM72400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fa75923dd3969c82606a646b2f7996ecc4c6ade894d6389f389814539c41a. 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/GRUM72400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7addfc04052242700fef8d966ded1bd427f904ced9c84a63fbe365cc7c0da306. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GRUM72301526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a36d3396c93a0c1cfb73977bc9334d7314dc534b71f481d832f6cd40eac2e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GRUM72400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cde1bbfe8f033d69e37faa04a0f0861eaa60d3a889f5e0e820923a6609c8f4. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/GRUM72002085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5708a5a247fb675d1eb978c562dfcdb79c45586f7463fb8c1328683355adb1. 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/GRUM72400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880947d7b67c6a6a92759d4e73d1dca58550131cf29af32d01fca05324abf1e9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GRUM72400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8cea540a0f7cbb8e9c5c435663d1abd84a617a1528760ada1db462eb587411. 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/GRUM72400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6cec9051394736a6e7d6472102ac01ccfef9ed7121f2806bc3ea747c479b43. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GRUM72400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a96e169f6ca092b6320a8e8c227cc529254d34bd886dae90d146696e5acb767. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GRUM72400682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34447340d392c47e5911733f36b0242707de9774a17cf0c0bc966cff1d6da3f8. 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/GRUM72400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17f30cf784ed70a5d0975502a065060451ab6c87643f1f346d4ce5f9b42767. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GRUM72400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c55f5dd1c3092193e4fb3e5f0700bdf3b0dfe556441321e33ec67ee7a395a3. 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/GRUM72400685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e95300499455f45661dd4d4a1d5ce1b5129b60eb2c66501c35ffbb4fc4ad64. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRUM72400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f67e9ed477d5f0c792f974d4eaba33f51f4615d80e1d6f918915c1c55c937ab. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GRUM72400687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9db9e8049d8d893777366c75ec2b03a8a370e9dd7fcad85c52ddb503545d9. 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/GRUM72400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa240a03531643fa69b3ec78d7795fd57dd9b974279371e65fad32a56b4de45. 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/GRUM72400690.