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 0x3f4147121ff74104955f2e7eb01c9481f9deca8cc6a29f392240c4ab6561b0d3. 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/0a806c43-92d7-4a22-bde8-90335d6b4c47.json and https://artists.proofprofile.net/proofs/artist/0a806c43-92d7-4a22-bde8-90335d6b4c47.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 0x7b56a8c4b6e8674f6156f76ceb1608b2df1c6e58a3b40116e2b0258d3f173c99. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZAMM2011080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d56ec8f6fb6bd25be39e5cb1b391051c2e219f080ba93711f6c3791b8dbf7db. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAMM2012093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977090c6bfd0f5657e369fc180f86c2f3a03ffd4425d52ee721781962148dc3f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:30Z), 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/QZAMM2017139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025762fe509c5e44edd1454ff92593aa1b261a10f192e70b6c924d8674101a07. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZAMM2018322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1898cb8feb3e06e1aa0bf344cebbb2982f5bf4afb596dc1f3385610aa172d9a1. 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/QZAMM2011065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226b56b81f16d5426a6d9bba54c08d9f687fc0f5c2d3dcdb5e099d6ed4f8ecdd. 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/QZAMM2011068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9b8941655f9d09c3eab122e51cc0b72ba6e7eb177dab76852683abb2488b4a. 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/QZAMM2011069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96ebc7868fb09b918ef65bdc99347696e64c85653f1f9514beb319e2c232ec. 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/QZAMM2011071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b2e14eaa333d34afa5f314f87c00b30ebab961707c2a58a7cb00f252b9ebe2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZAMM2011072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1c34e8e5954a5807b85147146fca0e97095e5233c3fb1984f2cb498ff5708d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZAMM2012084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9638810836bfdd8e1359437a32850f77461425876736a4ab7d8030398ae6ec. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:31:26Z), 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/QZAMM2013122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1de6b2509ad257b7240f3947b17224209f3d6b6e024fb45079c8c5bf12b8f5c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAMM2013124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cae5075010ce20dc9448c2039df04bcf393af8005f4609801236c9c86c17822. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZAMM2013125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7673e0567f19ece422c14063750c25486862557494172e77805606a0a64297fe. 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/QZAMM2013119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224297c0d598d303649a47ad175853b3774a97fd983a69d9b441c4add1663795. 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/QZAMM2012002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec84c9528afcb136326bb56e0417a9d9b31fe0a54ab30ae695a77041c99c7f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:04Z), 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/QZAMM2012006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f04482228bdcc9282724db763b5a9057b6190ddaebeda7a42efcb87795c0aff. 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/QZAMM2012008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4abd578ed8a48ef5ac0495598a27cc1fff45b3a9394602605bcc3289efd342e. 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/QZAMM2113457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda199342cfcd73fe7f0433c89b82ee6977f178bc2769a62708e8351ddd383b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:21Z), 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/QZAMM2018622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6074269e7d67770f829083b87e267c0b4178ebf0f10f3756a72e082ee5518d. 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/QZAMM2012091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153f374a299b3fec469c9f3df2f7366744ffec205283ca2c5f6b74c675d95c7d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:48:21Z), 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/QZAMM2017141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dee92a99a2dd5ca6e7662bc376a1373cb0dd792f6cfe07903f0cba80ab9ef9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZAMM2017142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fa15660784e61ab1def0069a463b39bd6fa886180bfeead5ae43bbf3cbcbf0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZAMM2017143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e93deb1d423b9281bb2d1f96f999353bf80991b3beb517b65af7fc25ad83a. 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/QZAMM2017144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd772aa407c5a8f9187d961f4400e6bade9a8ef128767a741ca9737978c4f5683. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAMM2017145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fdfea57151a6a488e46709b0470fc900a6d3c303b33113fc684d804565cf1b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZAMM2017147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb95f912d9d70fbaab40ff676fe218c9d7b8183da92fda2b9d4760431026c69. 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/QZAMM2111177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a3760c70db8ddcdd7311b8f39b219dd6da15315c8637c18fc679da82acd22. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:45:22Z), 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/QZAMM2019804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5059abe3044d68e3035b557101b3b0afc5caeeb554ac8e37680828ae9a5d3. 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/QZAMM1996778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7e05714fc7972518bf65e175706b5872a14d9120c0d9279c2768a161d617f5. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZAMM2004437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416a3cc1ba2d20b223e825324542dd01729764fd82c3fe47e8c09d3cc1b4a8c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZAMM2004704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9bd42e4f8f61d102e0c9ffabf6876657b0802674445f40b985982de7a8ffc2. 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/QZAMM2005464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa443419bd2f12d47919eb5ae07629cb9ff275b42a921c31865351fd8e2605ead. 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/QZAMM2172586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a54fb2b4987e87b5f38c6ce70416e185ed33d9ae897749b20dcc251ab22ea. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZAMM2189518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8905baeb6806812ead851625c371e2ada7fee559fc8bb46296b5baa38a873b. 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/QZAMM2129891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1492c594d8e8b69fb2415c64aefefc75db84bb2fb11a7a558b9d9cdc046780c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZAMM2213450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8c81db9469c0d6bc54ba9ecfe83cbf36fd887b6edd46de3014cd19db44b389. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZAMM2220032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3538bfe8a710eb422bea5ba66ce6917e8501b069fff20a16acd7bbe4c114902. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GXF9Q2479592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40276ccd130ad32909cd666fc49d284757caabb5a415a751bd93a0ff9c78473f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZSR42202742.