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 0x71fea704eaa0cd2ff0735bca99e0d6d2d0fbe093ef613b1bade2a1b54d780b9d. 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/09473b3e-0b10-4892-9912-041efe6b4a78.json and https://artists.proofprofile.net/proofs/artist/09473b3e-0b10-4892-9912-041efe6b4a78.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 0x74fef362a4e17b490e9f388978671268681d5a06ade2d25eb1b134c1aac62a02. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:28Z), 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/USTCE1057828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766970a5057e867cbd5d3ff86f6a61a2e4d0176a754e37b91c915ab34dc5a8d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USTCE1057831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805408ff9234435149d926b76076f51ba6e69e875095fe83f1c47764feac30c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:43Z), 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/USTCE1057860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9adde7bcb420d0283bd2cdfe21a0ba1a46047980c454c484afb22ecd12a2c78. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USTCE1057835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9044304fcdea0285d56c672478e928a9d56461f59cb53531d65f2357fb8fc635. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USTCE1057836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54715e8d0b5997b00279ac729954306f387efbc5a1f547c4aeef346b7f7350f1. 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/USTCE1057837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00712cef8433c63bb087ea9490443c0fe7e67d13d9b5fa4a08b7e6640bd630a2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:54:05Z), 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/USTCE1057838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad144032d8b8bf4d7d0f7156fb34962727acad27db4de5c28f318e3e20f10d65. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:21Z), 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/USTCE1057839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48a82e1d2cf248d887c7b76f608998671018c06aed4b1144d57d0ebda3d7b9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USTCE1057840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08e7e7c2d586d1d6f1a102c56ebada3c1806b6c60487418f28c1d5c0812139f. 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/USTCE1057841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2663cd2ec9d09be9b187d9e15b6a45943a785dce573825e8d785503cd005429. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USTCE1057842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9850c89e57e68df744a51a9e903f191e106f3a48508bc8d05db8a75780fbab78. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:25Z), 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/USTCE1057843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfae0aca19691abcfeacc2c274e7643db9aaa217c9d1549fd5bbb3c77a8f689. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:04Z), 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/USTCE1057845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735405f4665a3d56b0f524b9a071d79a9e481ae01bb6df4fce7281a0650426ec. 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/TCAFC2037005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb3d34ec60f7bbc47cd989fedf0472f09b91799969c4248eaeabb4f9846f72d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAFC2037031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0847fa840a28dd800041478bc23bb388a3e4bcaa731258aeb03b9c5b20bddf3f. 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/TCAFC2070980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89d7621dc39c7afb4817c9bdbbbcb3cfa2caa10f77febcc8b0316169415615. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAFC2070985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d898b91955721b39e4ed9dd777ca1c2f271e955f3097550aa06f5dbb64e2784. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:43:33Z), 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/TCAFC2070988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791113c0a41671febd8d23f960fa154597b4dabfb70e7121672128ac561accf. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCAFC2070999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09aace3c80b7a43589a639f6dc472faef55aa9ba8ac8df97a099dbf262cff79. 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/TCAFC2071004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48c88abadbdf55f4f6b4e360e48e97534288fe3a5901e92cf77b8871e73bd42. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAFC2071009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf548c6ad33b706f452577b7fab23f1007f4b1c4dc196ef53e45d99a63fd309d6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAFC2071014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fbcce4967fcb30365e3f4f11f73842b315b4c96919107cbaeb64b488db97dc. 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/TCAFC2071019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58530912cdd4fe23a3fcc366fb66166ccfb12aad87707afdd4f1e2f2f1013ae6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAFC2071022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac181a18399079c719bb4094d9717ae0ecadd808cb04d409b47527fb9287e34. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:28Z), 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/TCAFC2071024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05899505d3f11f3e02ec4f92a6ed50a0de88216cb02f82a19f63fa7f4b1c892e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFM2195329.