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 0x763b20f0b12b782fbc38751142f8959e9717788e1db036a218b4550f00cd6b85. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02a1b0de-8796-4812-a068-615823118c92.json and https://artists.proofprofile.net/proofs/artist/02a1b0de-8796-4812-a068-615823118c92.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 0xd6b2e641ab65bd65f5e51874cbe14cd90c1d0298261ea5e52b07a6ea538c73ea. 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/CH6542063973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dae62aaf5c0ea2d7785243fcc9e3c2f99af5b5f287910fa5f3daf5eab1f1d16. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH4196580211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eedab43e93e00adf3117833203a518b3135df89203438fdf746d09292860c8. 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/CH6542122896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe692181d8fad3d09cfd6463efc2ab7bc2389d09e51ea9f38b6dce549972c3725. 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/CH6542122897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c7898253aa18b73e4f4c1c706257558f44e7fe407201a27e9b03ea409f3aa3. 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/CH6542122899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a2f411f8fd6ddac947e17a94886dd638d5b89e33e58d0798a9703c7735dc7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH6542122900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97b4fa4f98f17807a4d5787e1b38944c934ddaa9d7baa9309b70ad8daa8531. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:58Z), 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/CH6542122901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2872e8c0f106673fc9b34d776714c5ead8fbdaadb9d4f1a3db8d190a5f379fc4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CH6542122902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba70a827d94bb95f26e88a875e1c3c29fec872b9e90ec1fcf1c99d36cd1c6566. 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/CH6542122903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0067f605c690d3a0b00dd601bb0ef55bb07b57f3b885ddc4e5ed2bb4c5d95. 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/CH6542122905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c90165ecc8273985169c84e5223e90d0dd92174f73f6b48d3bac1341663dca6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:41Z), 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/CH6542122908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73931e277112ceba1f2cdfeb8a079aece61038fd380e079e80db37ffcdea2115. 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/CH6541689300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa665d0dc5e4ee234d3cf3f5b803e40be82f22e348a0baa85d8e4d5dfaa77c109. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CH6541689301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe48a610335012e9257f55e39d18192aaf6f124ad5cc8de667b4be9c9468956. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CH6541689302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6192d3c5096399e4720750a4dba033b03e7d95556553351cf177093dc2947d9d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:32:22Z), 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/CH6541689304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d675758cf88e50e11e3ef8dc0fac956702638cc2649c6a009fc1e1cca1a7ec0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:19:09Z), 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/CH6541689305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3cbb084090cc80441870bf78e4c4c624a82e86f45b5db767e8feb488ffb45. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CH6541689306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c9033e970538de090a67587d7b9cd5287389dd11830a7de637a63661c1d7e8. 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/CH6541689308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392a5d683d6401a1566fb41ffb01cb5d451eba223db5ee1f141ad0c6f2c13834. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:10Z), 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/CH6541689309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0808b2eb9f8795f809da09a4ce61b29426c40eef88b87a40dd189f635adfa. 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/CH6541689310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6489c5b940d39c72aa6ee7af2c11f1215322b38be391dd05dde886ff08497ea2. 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/CH6542210367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b3862a516a9c44871325ea79814126ca345fbbc2cdab4897cfed44909fe1f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CH6542237990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6528c203a4e6367fd5457d14e68517c4c84293385b042e5615ef56df6de321d6. 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/CH6542277329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ddd65625e723fb476f2e93043fe85fbdb11125989332e6e1c6e5fa663ab643. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CH6542277335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa784b6ab04431d8dec41783c9420da0c45c640b41546205747f53a7f0d9e8cd6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USL4R2372281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2aa9cbd3995ba9a7f773f391088c8ca6e172be2fd494375b022a9541ea6625. 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/USL4R2372283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14f3c840addd3f2c66f73ecb35dfd82d5185c749ba77c1f4cfb1246ef55d862. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USL4R2372284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccec2b934200addc6b4425d52a83bb88972770dd8d427045a677c563dfc1d51. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USL4R2372285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3373f5cce81373103a0d1ee3612a841a96929a120a7ee2d3a6b9f9143cb844a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4R2372287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4543bc9277bebdf4d4d30d284ef0d8ec92b98f73647c158bbc71698f741a0e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USL4R2372288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bff84ae4d37d82528c683e749fc54cf44ed585f2ed20276fcc8c4d0d70a6ccc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USX9P2342604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503fda77ec54c8c60fecc47d9ae22c1e89c2b4d6c781a3b132f255e4901ea69. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/USX9P2342605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f864a87c136a18749a311d152429cd3d51d3ce69398232b65eeab2d7a4146b. 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/USX9P2387291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c1a22703805a0310bd3a0854e552f5d08cb0f1f1a154d3e2fa58972b2190c6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX9P2387292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a7f8324b91875fca8555cb6e843cb82d2f9e129a9b8c6e601724f8a28e8583. 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/USX9P2387293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b13e73ebbe3bdddae80ccd2ca6f4e61ddb892b802a6f82e9228270d49a4b34. 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/USX9P2387294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae353fb8a4386e626cc0c07904975ea6b5ca7db39797725dc7ccaa2a200895. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USX9P2387295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c991a44c88c1f539307aa226ef4fadcaf61d718d2e9504c28d08f26656127d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USX9P2387300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eceebd0500a71d09359a9d97a1ad4bd55da19ddbc5be8a37dd789499636382. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CH6542582097.