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 0x83f4f65dd21636755af61d59f7e9b25b51acd636e198f23146cf1cf663fdf865. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4724e4bb-870d-4b0a-885e-1ad2cd7ad966.json and https://artists.proofprofile.net/proofs/artist/4724e4bb-870d-4b0a-885e-1ad2cd7ad966.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 0xda4b1a1a6db3ef0543c455c5c9d2d3b7da0fd168ff934f75a4fbd034ce9c104b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2175694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e173a7a00286cf48456d93c3dec0dadee7c326e171f5b70c14efdba0c5ccc75. 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/USCGH2175696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8170dd1ff9aa471fd6630c4f909be041426453711e57bc2ed8b4879411c12ee. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH2175697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c95e2cd10e008be3c0309530ff50863ccace2b85ee293d5d4e263e46f6b4ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2058222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38777258ab8251b8159896b6a3dfbf39fc7a951f0159dddfdf3f1ba6336e9661. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4Q2058223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2576bf894ca18583c4c80d2c967ce4489b57603e1d7f96b9c326fdc454f6b373. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2058224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff50b536c00c99aa36cc7912fb5514957bc40d5ef277c068a9b92bf2936a96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q2058225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc13bf11e1f2ea1a21213023987e541a6e76aaee709bde9b509d71d338bf84. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USL4Q2058227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64424e8969770e0e237ad31707bb219d83a8d3dd37a46a93728f11933956a2f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2058228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0679b06f3b9bb110aa2e7039fe9316fb05c3d2e03c46ec8fefaa8fc64cec9d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2058230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972ec15e1b40424fb319a694e115a0b7be13b6c0f3547571e0d38d0c525e4cdc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2058231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26997c5704dbdcd94466bda1d084d8749964e33da89f55d68c47d04b7add2b10. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2058232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c54e6142ff0c737429a5a39f7cf9a64d211d5d4c1471fcb49089775e52cef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2058233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b900f0748984c6a79ad9c755f53196e8ef48557d4264b2acc1515aa05598b04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2058234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644fdd5954f572406a661dca5408487365fd73f7a135b2b81881c3b792897ba7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2058235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d9f8d4183ca3e082f3f52d307f892796f8cd79f6cbaa6b8b75f22f6069b27f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2058236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d50963dfd8d72ec15fafee5faaf4b2668ef3a2c52082ea1fa3260f4136b8377. 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/USL4Q2058237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab09be5112d3ee91f9f35fcd515a008b15c610ac70f11baca7454000b60c5e. 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/USL4Q2058239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a182691e3fdd5e3aefb0b1761ba0e4616f0f3080b552b26fe4ad4283ad929ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USL4Q2058226.
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 0x72e897696e79c73a27be43bae9795b3b5385e452bb8394487b84cd53bbc04d45. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USL4Q2058229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f25bc42bb8cd9d79121afb8c25b48aedfec25f6eb9c39479279572d92044f1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USL4Q2058238.