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 0xe1c1542154df1d23adb2ad2a3a1202aaf948fc199f0e216356a4ba3d28d827ca. 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/3a024020-10f3-4d13-a745-ac65b8a259d5.json and https://artists.proofprofile.net/proofs/artist/3a024020-10f3-4d13-a745-ac65b8a259d5.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 0x408c9f068cc657a8dc5a9cd16a30deaf8141fe014148aef59b200d350bb25458. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PL59G1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f6d740a4670b79d85bb8c3ee59186088159900dbaeca6d60ebb71e6f28180. 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/PL59G2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e8831fb4c7fe63d1ff644b590b6c9dceccce870434b0200a3c7671168ad4f. 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/PL59G2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430285d9806e3bf0a680518666b1245b0cfb947f2297dc2f3ca38c6620373659. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PL59G2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458943ed03e0b714e74eabbba0d591c908c65380a1cabfba33729d8995f8dbe. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/PL59G2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1b486ba768b8568b23e9a3c3a0967908c5b4230ec8d40fa0bca6b5153aafa0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PL59G2000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a968394156a1235b1071294abc42a37afb79b98aa0818562bd09ad1c4dd0b0c. 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/PL59G2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6f043aacfdcfc9540802e11863c98a84bc067f64c2114998b7c3062f0e3057. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PL59G2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a1bdd86b247c8f3ed78e3bf84e6855b9a7409691ac25c8ae2088dcd8231d43. 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/PL59G2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449816f8e0875aefcf6118028f8e671a311f47692110d6c7675c2bac2d2eb06. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PL59G2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f9abbcf20d44d0a133a0946e6f5d195c118c57c97d74d3891500a3a706e4d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PL59G2000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004647674d613c466f3736f3995ac11d1e46448c5aa5ec33843c86d64607376a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PL59G2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79c8e18648525e5ba8ac2309d65e2c98fd893a665de89ce522e7a49f12ccec3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PL59G2000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066cd7f703663eea4dab233853bf3af0909b917cd8d797f166a4868a1718a2a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/PL59G2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc747556300d8b3154f5063613fa069014221f971317151ea647b838d0d1424. 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/PL59G2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57d4a70d83eee7769a62f9f940ee0fe35438e127c97f3053d55b4dec5aa776. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PL59G2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45729af40a337eb0cc2234b7f5ad32824e7e40aad1eaddb5f5457c65af781041. 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/PL59G2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff6e788de8a532e03ca7b80f649fa1389ec8f61655ad58dbabb951258b81c62. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/PL59G2000123.