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 0xc2ac265740855d1bfc0a4d2254f1095556289be205942cebaf3283cbaeea7b9d. 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/57fd15f1-688c-4239-a639-979dfa1dab0d.json and https://artists.proofprofile.net/proofs/artist/57fd15f1-688c-4239-a639-979dfa1dab0d.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 0x3ba19f948447955c118cd1f55693ae158543c6809ef5709d9759dde493ce4f1e. 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/USA2P1964277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c85e3b6088d02a6ea9d7380b2a6f2861ed11a37232131c71c3545be476e46. 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/DEWW42000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631bef64ebc891b8647493a79bc9a6d123c4fc91bf2e7062de043457aa2c6609. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:36Z), 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/NLQ8D2000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0eb323e4e250c129c4976104939b080478f7d398b84267a2e9ed900101c7a. 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/NLUW22001069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040231a27f08d0a00b23e5e19aea95896558a435ac8a92d555b0a8f9faa6ac8. 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/USA2P2038304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec5f5e9431e020df9741b5a91e3912540bcf43197334abac0d72f5c9b35152. 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/NLUW22001199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb65970b31475675085e6293c1806c22ebadf64f70ae7419298b2793dba434c2. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/NLUW22201550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ed4ca81f6f08932f2c6d60658ed8d082b3364b5a8f8d51ca9abbacaac5037. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:07Z), 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/USA2P2230044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc80afd5a2b021a0b6a2ead635cebf17aa8bfad4cdef3a4a45af4136e9a74c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:58:45Z), 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/NLUW22201722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e7aaa374f662540505ac8c3b3f8fc4218cd673057593b6a00eb5c7949a7c3. 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/NLUW22201821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226be3ef3082b760994b2d65ee592e54afd83d3a280c9eacf9e6f6cdf9892706. 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/NLUW22301970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a236f1ca7b0699b17d6b0f10d0a91127121e90df3a47003ca82c4f2b3faf9e. 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/NLUW22302155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50db03ceec5c28ec7a8a9911d38c2504ff5658f75f7e8b16e2edbcc5dc255cf. 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/NLUW22302243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a04bea83ca55ef0469d32167835ed6a35d3a0858fb919375e294a2117567da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLUW22302244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a96cbacff1e7aa520a7f67fdbd50d08a077c3c1444022c3512c544c4e87cf3. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/NLUW22402324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc429d0a0bdf3b6ff7aa4d57d0698f37bd8d49f50f06eee3f1851b948917426. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUW22402524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96581a6225b5dad348ee3a4b20c2e2c617837308492462c00c44eaf097e3b4d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUW22402564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10115de63d22d2970360e735b400d8835bfdb577c491fd43829ad7890ab8d72. 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/NLUW22402654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910643c9f5f9e76df2b340593ff00b4cafe37468b11c04035b8d5ec0387e06df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLUW22402655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24bdfc7e5596c8038632b936bcf9100304567a54d41ed2d628360b7ac00a86. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLUW22502695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636b732cf6f4ac1ff1b427dfbb7d9b6b8d969a950c5ad109cbc1e26b6921e9fa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLUW22502794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e37afd8492a883847cff0fb1d9e1f5f3fc8ef717878d3a51debb01a548d5fa. 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/NLUW22502793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544ff733c227f8c50d4671d249e01add6226aec937b00e31f179b473d592f101. 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/NLUW22502874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e1f57459adcf159bc021a258a698cc04e127aad08e745bcd9364465ac023d. 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/GBXGT1900203.