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 0xc776efd0dd8ccd4ad875d7e90c942ef5b45d3314b1a962ec69a741bdd90ca2c9. 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/54b25056-562c-49c2-9d91-7fc80dd550cb.json and https://artists.proofprofile.net/proofs/artist/54b25056-562c-49c2-9d91-7fc80dd550cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa9f4543f6a3b87f25004d0b2ac0b84a608f179c30f27468959851788908dd29a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU5501699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5734e6baa58332d7aa15acc350d5e84413f81c9444b0e73cab8c41801d1827. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBSMU5501838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ffdecd74ecd687fec7b564fb411bc2a8499925fcf25c33c2455be0a28199e. 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/GBSMU5505563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778faa9beb666ce32b43c1f83a84835425f41d7fc5a43bc330edb552229920df. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBSMU5505600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285654e05f673492347a49ab9eb805229eb38eec5b8d71ff26e95e24e3b1f681. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GBSMU5501697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8602b35a25b0289fb1bf5beb0be51d2d578fb69d8d47b9ea81f16649e80e9be. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBSMU5505386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbedb6532d0bce7ef972b9710ef3a79935069548ed74f2ff1073e87eaae6fb. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GBSMU5505387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbedb6532d0bce7ef972b9710ef3a79935069548ed74f2ff1073e87eaae6fb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBSMU5505387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da48284c6dfb2a56a14c8e8987cfb48e4cd182dff5a336d9956bb9111e2f7d9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBSMU5504947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc66a3e23d1cb4eb522919ee10a962be0080624b9583ea82702e936f34e5772. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/GBSMU5501159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ffdecd74ecd687fec7b564fb411bc2a8499925fcf25c33c2455be0a28199e. 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/GBSMU5505563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778faa9beb666ce32b43c1f83a84835425f41d7fc5a43bc330edb552229920df. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBSMU5505600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da48284c6dfb2a56a14c8e8987cfb48e4cd182dff5a336d9956bb9111e2f7d9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBSMU5504947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc87fb286c87a3887d26c92f9a35074f125b4a1cbc5dae37345bfe5b9452d58. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBSMU5504968.
Nursery Rhymes Volume 2 (Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f8c4e5e7b04bf2ef95716580435098583e3a4d3df92336c799d8cc9cce7808. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKP3G2009688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f8c4e5e7b04bf2ef95716580435098583e3a4d3df92336c799d8cc9cce7808. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKP3G2009688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86c0f385f7ab9bf25139b47752ff7f0492da6567eae7003bb3d3474ed5bd37. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UKP3G2400467.