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 0x43dcd3063f3c2beb150ef95fe701f1d7934e40f424450c5f8a4ce4dde98fcb45. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64901f45-21c3-49ca-960b-5e574952cafb.json and https://artists.proofprofile.net/proofs/artist/64901f45-21c3-49ca-960b-5e574952cafb.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 0x80b308f310b92511dcf069406b401616e87df640fdd80a25d550e2d05606f06d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEYJ42300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc40caeae2e4edb941d36d0e5035636276580bf7ac2a5f244595406f2ba3f790. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEYJ42200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9936f97470fa3d52a0e7e392c1da25fae3085021414c5b81c38f0e4165b72ba. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/DEYJ42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e2d33e4d667bd946f3414aa0a18ec92d48cbfce2684e05628cb889779a9747. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEYJ42200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0a857480320a96c117a928b3c466a5d338685093130fec1794534f184be5a. 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/DEYJ41900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ddc3ae0edbb5645062a5d2bb5eb424af661ad0610c6f9c38322a4fb750bb31. 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/DEYJ41900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285eb6773273ba85de400370367662d34cbf2a85272e264c4befa049c1ac560f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEYJ41900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076eac0810727b3edccd5397195b61cd5ae012a5a3fad93fd436dd36602980df. 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/DEYJ41900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464eb5115bdeeb0cccb9311fde15d6e162357a4090b15592d59d288c41b17d30. 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/DEYJ41900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507c0cbb970eac9e8260def4c3d1a8f66d1992d43b655840c968f57cede5c101. 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/DEYJ41900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ee93466306f65b77c0ffc9c1b78e1d533679203d132b7d86671f7aa3fdeab. 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/DEYJ41900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4fcf4600628ecae12ccdf17b43e5e210baca0106cc0ed15c58123b0e55c60a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEYJ41900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43cac45d61bb686f4d48a139a71594d9809db79a2fedaddb67d70bc74af50eb. 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/DEYJ41900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4b0a01d81b989958245862fcc54abd339efb6370d881c9750c46f66690976c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEYJ41900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d250b638435a5dbd53df5b31c6c6cbf1d3617b6d3407a49d054a435a32d71. 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/DEYJ41900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa602c81eacc2980efe4868adf28c09e7e965ad5b38d55ccecb48cb2335e491cd. 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/DEYJ41900006.