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 0xa5da7d91b02c4cbbd874964cb1395150aa575022ba3631d46a454890ee97c3ea. 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/f2730054-2367-459f-aead-2c5d6b05f183.json and https://artists.proofprofile.net/proofs/artist/f2730054-2367-459f-aead-2c5d6b05f183.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 0xd6a263e2a7a253c6a5261cdca6d9de92640b2ecc8b54f4d38410adbee4b8765a. 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/QZHN82023147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1232375c483997e0830964ec9ee18d77625fb6f98091f66c7613701ee637c28b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:44Z), 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/QZHN82023149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7927a589c41fe4f7dde0b01fff3b471c0223eb5dd77bc80af9db68343d72386. 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/QZHN82023152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a05614e8330d5cfd5d91bdb4ee4c531ddf4076a33770f8199bbe9aeeac6ffe. 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/QZFYY2200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28964dcf946e76971b8262c3457c3df8a840c2c76339206fd9ef9c6bbccedf. 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/QZHNB2251516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b21803124d63731ceb4bf2b774c06e22d40172cbf5335ae0ef65ae89ac6566. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6M2244453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9cbfdca436f30e73d977cd01c21cbc1d0c258b42324a2e5baccc8da508573. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZTB82206750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab20bb7c6c4e128b517c5b1e4de3afae5ad42b2e92985cca0dd2db27b9beac. 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/QZTB82206751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08b8bb64e005d08cf7a2e01ff99d0da8b86afbac6ce1aca54911c6512c7db15. 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/QZNWZ2242790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ca73e8b263d982cce7df9634e2d6f86ecd94fc9e1854155d5ede6db770d3a. 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/QZTB82206752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7bd8c175a1e458d113125aefa040289ea8ab3aaa6f341ed9c24efe12151d40. 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/QZTB82206753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b4025f13c7b24d66d1c30730eb9953e51a38afcfc256aa0c4f1ffc6481496. 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/QZHNB2247117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9c3aea19c390c372066250c51b686b40b28ed2c8ef5407593c3b3d2d67e670. 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/QZTBB2213988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03638b918ce5653f3dc69c31fd259c65f4709673fd8d421131f5170d9fdbe64c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:15Z), 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/QZTBB2213992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e6342b2066b37c7a75ee69e351f5dcb42968d4e4a5481d08c68cee0b83aa76. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTBB2213995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eb4fa0561542cc94983f56439f0a3511a163fca495b98346fda37549b9dac6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTBB2213996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c118ff142577cef4c3b95b98ea028825047e845c3dc22a274eab497bd8df6a. 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/QZTBB2213997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e09f10ccb0b61539475631f47694e0db6898acaf8346115312e111371540d54. 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/QZHN32315003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1834cdab49cc6b84394033855e942bcd98c0e739cdfd2f37f742fdf2fbf327. 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/QZTBD2366860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e90813bed56c552dfbb7b85afa3e5936ee3c02c938fd58a2250ea181ff01be. 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/QZTBD2366861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2ce6fbd5630fca4c74a4ee475911071140baf4959ffad82cd1db0ef8a3e2eb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBD2366864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bed5c9c4d01dfd9e9ec2638c59180db68a333c0e1e40b942e033917316a8801. 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/QZTBD2366865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b5295b1ebaf67168f606d1727efdd8cfeee753fec58e1bc6d41e668b9e727. 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/QZTBD2366866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2c1652d6bdebde2d460e8b08c2b9e988241d5732d534efe04e104f2328313. 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/QZTBD2366870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5de6291f5689fd0f4fd5966728c5586f2da9b693e7fa87c5304edc340e4ebc. 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/QZWFQ2355402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41ee5a9119c42caf0d7b0a18018f689086031fbbedb620202f009369f9d611. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFQ2355403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3959f7b2e38475cb628feed0682bee467a6324309768306f2d9a85177f880c0a. 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/QZWFQ2355404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21d60596166813821bbdeb945a0a1db24e347c21e2e454fe4977fd73746016. 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/QZWFM2371015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb911b7142dc8135ec6d96523e22545e5194667ea6271bbe08b06f79fb3d2dd56. 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/QZWFQ2355405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f5b5f7332a5ac70a380474d890d44ee0cc6421fdb9f318b273c46d2887c8ef. 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/QZWFQ2355407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1e051c976028b0f2155d53edc9eb304dcea0ddba9fe310cba4a5277be1c14d. 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/QZTB22492558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc66efb20d8b89a50ec4654db7a2aea48a4eafe526fd9c478751f60ab2fc3f0. 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/QZTBA2459476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f874a180d3c345ff71927139200b824f0abe5d64f4fa81def6b594035292ebd. 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/QZWFF2472879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fd58642b794ba8b6a4a5c4309195b58f4546c55d80096dbf5ba712f2646987. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFP2424188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9b987effe51b8f549cec323dc1ff1e5c9b23351a8b416c02f77c895c6eb673. 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/QZWFP2424189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c32077f1d972382301d248c658021c228bdca60bc82bfe401d72e6add7c91a. 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/QZWFP2424195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cbc8d3ddf74ed7b6b05b34516819804f66517427714380df3fc9fdcb1d718d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFP2424199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f514697f36fb938f537329dbd084b2127029021b0fd93f6b976ec12be9891c3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZWFF2469206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a71ee1beddf55620b4b1234e94ab39976b5bcc6611d975e13ce1be23648ec3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFP2424208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c83e75587ecc0e377b44858863dbcb6f8358cb72ada5754f85f5d065a9f78f. 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/QZTB42515071.