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 0x0ec413aadf9d57d0101010e0afcdfc1e07e49cb17ddd573bf7cbf09c2960432a. 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/7305951e-25a7-4a9e-b9db-2ffd7f87e598.json and https://artists.proofprofile.net/proofs/artist/7305951e-25a7-4a9e-b9db-2ffd7f87e598.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 0xa77cef02808e612d728de74fb741697a89dd92afaa80752aa3e11428400da799. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCADB1734701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c510512846a3c38aabdd9775b58bba869889d7820890576f9c78eff62d125e6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:44:09Z), 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/TCADP1831063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46cdc4825d6b08c2b9e24a1f9041f364892b3cefd3adc04b91d4b8fed322bd8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:33Z), 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/TCADU1862217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fc5db8b0f464b1ecf3665631dc54b8f49879c1d98c2babc028ecf2f4a62ff. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCADY1837752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e7378f9b678dc6496af8435d38e39f453663d0b92c1199ba06b89a6ca838bc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:59:57Z), 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/TCAEB1989880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e548f78863f1b05add41914525b2f953273b276c65154e5cc6b39f1f79686c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:11:02Z), 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/TCAEF1932439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0118dca975ca5271b5ea37b5fea2b87e4e78b9d279118059f21664e546bb291. 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/TCAFI2193145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd3452454bdf390409b94685eb9e9824459b395899b821956f59e62a5348ff9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAFR2160908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3b66c6384b7f3303cf5e1033878943b795eef3dea607b161c846a3c8adbcd4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAFT2101103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf014eea8d4076be4f88abd0c185dd006c877751877fb426b957dd51ec2bc6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:26Z), 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/TCAFU2119837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b0588c3253bd0c21eb108d16d73d6fbb5662ecc192c8b77697b69fd7fc798a. 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/TCAGA2225180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36055bccc0a7693d4c9fa48ccb21f7cef009b0c3e9fbdfd48f1fa42b03aa330d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGK2267426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620f6d9b8b4c1776596f5549df0cd45b63a46b3e3cb2927620a0122a9c8e469. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAGQ2291746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7933fb3ba4bde0ed414171b13deb3ff823abc3c08b81dabe5104bfb42c9d51f6. 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/TCAGU2321692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65df400e53e56deab87f8dc68dc54cd1f2004f1507cae9416798b0643e5a336e. 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/TCAGY2349066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba98e9c9b7fd87dd63d36af14fb02dc7682df8fe78ee81c92a4808aaae2001e6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGY2349085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5408504a8de33e9df4a64a3f68862b8cb7361f204d6a3491f4b4490c653a2eec. 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/TCAHK2328930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3cf1a0b6cf2ad6fc61794d684a2a2d4dcb13760dc205935581c35a170002f. 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/TCAHY2487561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460707ec7c0d872bffb3287780826980837e1689b88006e0f9a76d63b208a1bb. 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/TCAIG2406161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb67938774f492b562c9688e70863e6f9001b89df0607080e23e36a42f6d741. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:55:17Z), 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/TCAIN2400193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3cf1a0b6cf2ad6fc61794d684a2a2d4dcb13760dc205935581c35a170002f. 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/TCAHY2487561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f11c47327aa7fd5db3638d6b70fbc905fc4c414bbf1aac4a39372e799f49947. 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/TCAED1965339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fc5db8b0f464b1ecf3665631dc54b8f49879c1d98c2babc028ecf2f4a62ff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCADY1837752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2620f6d9b8b4c1776596f5549df0cd45b63a46b3e3cb2927620a0122a9c8e469. 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/TCAGQ2291746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13564ef24511d07b3d10b9fd20cfef30c530b7e1c3eee566289eb6856ca6a683. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZVEM2571136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf25df764e285d5833dd9c0af5a653a8257e23c8f20def8912fabb85eb2264b. 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/QZVEM2571137.