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 0x977dbf8b9ec0373df828fd2c6b6caacc6b75c567bb47cdbc206540ec2595caca. 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/6cdb9343-4d56-403b-8abb-138568cf9ffb.json and https://artists.proofprofile.net/proofs/artist/6cdb9343-4d56-403b-8abb-138568cf9ffb.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 0x1c0604516a6799baaf55ebe1e50cf9b9993a5fc4e7b78c61a873de649559eb45. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3Q92408609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf8ac9ebcd9f8d412e77b569c5a12968cd94fc83545ad59a5b91b493295344b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:18Z), 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/GX3Q92408611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65f42816dafa142aba601756a31cfb1f9596f7dddb22cbf1b74e093b1250ec0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92408612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651bfa65c10f3e375c0f8e4fc72a11b0379a09e80a622ff751c1f8434b6d3cd2. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GX3Q92408613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0210bdd1ee142f5969cc77bc61d8e6553671283e9573049e1fa96bf989afa3ba. 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/GX3Q92408615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba62e074442589e04049fe94423c60bfaa93674baf9c780fd81e95b2e63d49b. 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/GX3Q92408616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aefb4b9569aefaaea6ac8d6eec0645e2ec26967dd63f2d7450c2699035a0761. 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/ZA56E2419954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151d4f03c2a127fee5b4bd0dcd7ce798ebc999964e83c698b828feabd76103f2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ZA56E2419955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f840c176ab9abe692538f5d35fd5c057bfa678f1fa96f1c251e4c8c261282. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ZA56E2419961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e8d84f8c88b275cddaca6b23bc8ff9765ff8ddd81a802a25097daee87f1104. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ZA56E2419962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a5e7c5c649e679966cf8330cd3b4518e763de01668f8a0517c55890fdfd190. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ZA56E2419963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410b2acaa9352f09e2c889f259617240c046e99c1e238cf451f3ca065dc282f. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ZA56E2420703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d667efe175453dbadce15fa06ebc34058eae9f00f26feb2c7bbfc7c98a176b6. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:12Z), 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/ZA56E2420705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0e425c39b6d40e455c814ab26f2c66e0ef9a63bca05f52ad152f376888891. 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/ZA56E2420706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75843a17cf258e8a432cd591f066d2de0a346100abea52b3c821efaaa587b0ea. 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/ZA56E2420707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd2e5ff6c222b1ca0a365c9a2449e002a31718d121d3bfae4c412d025b7715. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZA56E2527597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d186230b0b6031038704a2600e350febd22eb60e9e8aceefb68460cf6fd752. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZA56E2527598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e4c435181a22ff2598a66c5abc007145798e4ab1f46508f8859d0aa4733d5d. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/ZA56E2527599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366eeeaa0920b151eab1b64a35d14fc9a3c3c5ddb558275ee11e9727d0cafccf. 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/ZA56E2527600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe067e43ee37c052014ddade8aba9bb4d4a0b082cd201692805e96fee49fa9e65. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZA56E2527601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf5504dbf49b6e3ce956edf9de219e0a0fb461f7adffed89d19d732c6f4f03d. 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/ZA56E2527602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517d7d835cfe3d42a10060b3b55ce3f2f51bfc151c6265f74d163affd88c92bf. 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/ZA56E2527603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa04f97bc63cfc7990536de2f2c2aaeaf2102c353b80e7c7f30a07bb2aaee34. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ZA56E2527604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90499ec89b8337f03e0378aff1893022673d6aa1ad3aea49a739f85ed8d9e507. 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/ZA56E2527606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26dd7b2978cd99d18ffbad6de3660b713df292f1d1df8cc5ba57b613edbe280. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAOI42400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26dd7b2978cd99d18ffbad6de3660b713df292f1d1df8cc5ba57b613edbe280. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAOI42400002.