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 0xfc9a52e91137ebc5b466f682c704be5f18f48c458bd9c16d9aac93ad3d9ff018. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f0232e4-0cc0-4731-81d8-b36dd67be666.json and https://artists.proofprofile.net/proofs/artist/4f0232e4-0cc0-4731-81d8-b36dd67be666.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 0xdeffddd1d7d68df2b11469e904336c53123089053e619c2cb9a579b2591f6f83. 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/ES75E2413540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8cc81c5e073f8bd65bfed2a2bc37f448a07b7eae880f83c4fd5f5ab07e82f. 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/ES75E2413526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa70c953e84e6078f283eaabf2c6398d4f017d1c34ece817b423b14b846b381c. 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/ES75E2413542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43743c28eadda6271171c34f4a6b9939804e7958796ec81de76beba8b24b27e4. 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/ES75E2413751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cee79770723528b06ad652e316ce0aea2698df2e8e8af83135407c178fc9e3. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:11:14Z), 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/ES75E2413747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea98cd1117fc7faf12e759f5c7a11e6224a5778b53cf0b61fd292c0364876db. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES75E2413748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943dbbdfd739e1e5fdf049a4d558b02656ed72725d3263ffb728192c7a629743. 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/ES75E2413752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5481df6c41f7adc4128d2e30c0260ea7c74ce18063a8cd7a7f4d6e82008b5e5. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:10:13Z), 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/ES75E2414298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3e9c8eaf5adc183969c3857ecaaa84da3988a6e723eb5c5039131af7f5ece6. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:26:48Z), 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/ES75E2414304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4f1abe08181bd1d2d4978a0cd4a4838b0b69f245648acd9465bf0855afb85. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES75E2414303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3896aac10b35ddb0e765d0446e1e3f4497d28d4b3868a7ded678f2e0d58e9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ES75E2414300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3298ab2f93ba53dba9fb68a96f1172f29bcbf3db0b639e36d3c3232a66d43da. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/ES75E2414251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8a4eeb334a652862215e6a47e01cb6b505d3eeddd3f8e7ef5e19ae0c1b2c72. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:38Z), 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/ES75E2414299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e2dbc34b0f9d5bc9f612dcb5436e62b5e362a592ed0bbdc10fe6174f81ece. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ES75E2414302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2af0f1fcd548a38217b99840db2abd40614f1680b34d139dfd3eb0e5ef3a9e2. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/ES75E2414297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8675cdc7b9dcb83e4267c09197a66d82e5c8c97890c4b68ad24e0ca2e1ad49. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES75E2414301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa88dc197822b4e0022d5eb6952cccf10ae21db143bdbb5454f892e3a7fb55eb. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/ES75E2414252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a8098beb5abe3b4691901e872b432d8bf3d3da2dfe0db364b04612b711d73. 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/ES75E2509335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8255d1830837482993f480dada1ec6e781faccd92095cffb5920a7e2b69462. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES75E2509336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1dcb17cec4318b3e774907434ce7e293af56581174d7df0038ebc2cc5ae252. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:09Z), 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/ES75E2509337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c00e81c112895712456de7bc05bb641fd1b17e879e4344bb81d8a4b9508cf4c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES75E2509338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e5973170e829c16493ec462e2855989d8696f6057a79b5476dd90ab56ea6b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ES75E2509339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f2431d38397ef5ea2b5fe878408a473fbae85259b4ff5c0dca99e351803758. 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/ES75E2509340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ebce6a2ffb3d8f51ff7e347dcf8aebcd019c720287549138b89365bfd8a41b. 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/ES75E2509341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d632cf7ecd7fb0438af759c35792e55b495e8066463454295d0b75d23fd304e. 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/ES75E2509342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3700ba3fd341d02bc4be033e2819b766b8f99f58aefaeffbcbe8e9a7eb3a54fa. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ES75E2509343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c55687bac4920c8d9f35887a7f488e051214417a12127cad22cbebc44c661. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES75E2509344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0d6b8deea1ceee8f4a17726ce5b61ce20a0819761883052fd0a74fafa3f25e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES75E2509345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f78a57b9b1c816f1cf3de7ce8fa5d61754a98f6dfcf1f82a4f6d09c58468416. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ES75E2511006.