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 0x56442eac74a5f9d481aede9675996fb2b595176793acbb2d10ac8570e506ef97. 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/1bdfa12c-8d0b-463e-b64e-d0179cc8112a.json and https://artists.proofprofile.net/proofs/artist/1bdfa12c-8d0b-463e-b64e-d0179cc8112a.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 0xbce99c3a07b0af2f80ff065374676e44eeef36ceb5d3823c0385a824037f6bbb. 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/USQX92305330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb2d33b3a226352e7bcb82f9f6bb88ca82f26adaaa8ea9987f58f5ef03f8109. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQX92304226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7beb40f1b970df304822de7c10333d10a1e46a0012869e8b151f1476a35d10. 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/USQX92304538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50636af1dd28150dc266ddf595741990f366264e0db5cfe9d9eed170d75df10b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQX92305589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4181cbb206b8b67b25b6052cf86f54c0f1bb033c5ffcddd9d6b2623fdebebb34. 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/USQX92305590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c7bd1c63a484d4a862e054d9d60aedd52cc29ee58c46a51c96a80b09b80733. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX92305591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f212a158fad43d35f59051a055c6d7595d5421c661f4b6d31536d4b46cd5c7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQX92305139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7cc5f6e60fae50518d8debfdafd8f9a268abed583a443398525d95c756ed3. 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/USQX92305592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474857dc4476a49948ee924c06aa84026483280896fa32a8f03809e1c12864d4. 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/USQX92305593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f269dfd431144d23c157079223fc6ac3b51498067020a634d0b4efc75dd274. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQX92305594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11142b410bbc1ec835a49a49349076ef4dab348c6b701060b030b56d68e4675. 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/USQX92305602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4e1043a025486d216d59c13f3c0d55708bdfc60f6f5a6b894771bde261e959. 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/USQX92305595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce99c3a07b0af2f80ff065374676e44eeef36ceb5d3823c0385a824037f6bbb. 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/USQX92305330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115efed4251b9a4ef74ea457813e32513e149b03e45ae0266a386ba95a7ee980. 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/USQX92305596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23437eebcac0fcf5e357768b8d3b50158f9ec0736da49fa3923f03c8ec181aa5. 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/USQX92305598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d632aee2c53c98d5e71ee12fe253fbb1070ae94b19c7cce7f15a012903f2302. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USQX92305599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82462c110889274dd2e1bd68d3e14d7275d249d149d3f95e5ec951a0073de69a. 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/USQX92305600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902315455593a0bd3100191ba6949294c238d16afcef47f228bbd9e269b69de. 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/FIHYQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffce94894b286aee82162610e8ad86f396b004f34da0e584fd5f9d72fd9180a. 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/FIHYQ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f212a158fad43d35f59051a055c6d7595d5421c661f4b6d31536d4b46cd5c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX92305139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7beb40f1b970df304822de7c10333d10a1e46a0012869e8b151f1476a35d10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USQX92304538.