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 0x851aecd5e85c79d7ba056b5701008102d92c318c44e145181df2a265def0e7ae. 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/3d9f9bd0-4750-4129-85b0-20c8225ac250.json and https://artists.proofprofile.net/proofs/artist/3d9f9bd0-4750-4129-85b0-20c8225ac250.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 0x383e5201f4a791b5b910491e7c72eafbeb48f6132181dbe4150421da4474b30f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USDY41939075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392aa55b9aafe9257cf98e2bb1c2ff209adecfb74c3ac3fc458b8aa77333f6e0. 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/USL4R1932824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac313802b2e1dc409c594e646693d0f39597c8846033c8e0ab4d09de484299ea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:39Z), 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/USL4R1932826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c020d18b87507e4a7315c4beb59f2f35c2a1f5f92d430e385a3ffa9885878. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:21Z), 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/USL4R1932827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173adbccfc5615b5ac011abd0d4d421a2578c13ce47bb8689e441e76119e5fd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGJ2078380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf837026f38faccbe2d73fec0502b42e223b5131a0e59d3905121cc28f7f60d89. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:00:14Z), 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/USCGJ2078383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85d79ec348b7a87040768f6be3977fc613552b03bce740d41ee45ea967980e1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USX9P2006109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6d7c596abcc913845a7d4c7d2360b122a1305f82fe5e5fb4ce9baa9ddabe0. 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/USX9P2006543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a94fa972d875930482fd3603d24dd44db0dcc4460ae2d4800f74a6252870369. 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/USX9P2010024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2dd81de4bcad88c107e8c91f95ca19eb44b8f02551aabfdf7e5b9e63a50c8. 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/USCGJ2128220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67740adcb07d4351aaf421dfe9ce712ae65f349622062f790ba2d4c2e2677cd0. 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/USCGJ2167235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397bbbb57cb3fc69ae7f800688dbacfdf136591504b2ac55e46481d6d54e76ab. 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/USHM82173617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a827975ab12c7cba70298e2adea7c65dfc2566bce33d6386e88b5d53ea82ff2. 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/USHM92120921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e068aca123036ddf5d603487518abc6db416222364adeb09eb2a0624e50c6. 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/USHM92120924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d40e12a58c0e5fbb7304b8bef7e55f5324a5fe3a44f822f815364132baec8ff. 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/USL4R2160540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e14b32842bda4e5e1bdad87ae50f217c652528ef3b12142d1d1eaa2d207ad. 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/USL4R2160541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17174d87119abacea9a555c1a1cb1290509562ae7356876174eb1ac53a9712e. 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/USHM22273692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab577453b9a4f43cdea34eccce68d01265bcd04a61ed2a60c4e373473dff3bab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USL4R2360227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adfdb200e2b79bd73b0891bf75a486536940fb5eed720fb154f384d3b43e2ce. 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/USL4R2360229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc257d979826fe89986b20fd814375de7bf6a51956fc706ef689ef45b874f7e4f. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USL4R2360234.