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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca89867ba0afa2eee8269183888a44581e2826b98b4a8c7d0062da564e7ead7f. 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/622a162e-f41e-4a7d-aa34-1d166f5fad89.json and https://artists.proofprofile.net/proofs/artist/622a162e-f41e-4a7d-aa34-1d166f5fad89.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734b1e3baa2b2427c69e04e2e09ae68148067117348226758cb40fa96995cb95. 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/GRPA12000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a12e5a5e9771b0f8cd6cc0f4b9c3d6a6b50ad1d30bc1084cfe8996dc6c143c6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GRPA12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362fad8b8731275875d0de4aa86cc024262120d4fd1d25f6cc74fe5183b14fc3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GRPA12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9535549f9498b96db67f829829c6ac59d455b712b47e27466ae32ec213deaffb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GRUM72100744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eab47f6b5a66cbf4417016ae7be54478f53631a0c2d7cd0988c015b6848465. 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/GRUM72103056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848a5b10ec891ffbcf8e84af359607af7121a88019a724296f16a39dd2eeae52. 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/GRUM72200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94494c7d53a96f9ce7f7ec69367d9bc3a438fc29afcb0791cb137762e48cca22. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GRUM72201810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86afc7a30892a7f85f58c966c6a4a11c0f3b534a14dc7eaed59e360cdfdbf7bd. 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/GRUM72300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a70d1f6fa888eed6d6d4fb243d038009aa8cb27d7f7738665a93ca2cc58a8. 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/GRUM72300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53424cad03627ba0b26a433ee3bf7c902a8a1ed2b469cfc3268df29569fa5100. 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/GRUM72300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f89329d0d9d7cdb3e16ff9fe39866fc677aefe3eb332a03ce1abc4f865faa4d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GRUM72300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e691d1dc3dbe1285e228b64da53a89f0492354bda8d382f8106a52cae834899. 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/GRUM72300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd540315be0aa2e73237a9fe027b339ed02150837fc10fd6df961505d805f25b. 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/GRUM72300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e792214b339021bc0ceaa7c5fe3d53bd15005303098237afb23c95cdd99ab8d. 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/GRUM72300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252b60380cfebad5fc73068c62a450632ead06fdcf7bfe6d1547ba72e66da968. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GRUM72300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe5b340306d212ec4365adfdb64869c7584d4387663177ec519d9be58d83016. 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/GRUM72300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df84735ee9f265830e4489443682164fb82a73680525ca967235b5b65cc131e. 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/GRUM72400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ee6d0cbb488afecf9ecac26566830264325565533c43bec1dff654fbeb2a5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GRSTY2402732.