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 0x7e1b768185c78cd5d975ee49014369445db34f8627bb493e5e28d78229b58b6e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/487110bd-92f3-4f8e-bdc3-386d4041fc2d.json and https://artists.proofprofile.net/proofs/artist/487110bd-92f3-4f8e-bdc3-386d4041fc2d.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 0xee0306bc138a409587eba8760b6395df6d0edb76667b8a008b7a5afbd9afd7e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE3OH1716394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dccbd4660827cc343ef48121c0bccd4ba974b08e394b028ddcb110988455d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLS6R1701736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e0aef08f960cf71476626992ef664ebcba6132e61529a01ace4bbabbce4e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:00Z), 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/NLS6R1701738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358fa7175cfff32fd014f471ed28c5efa1b15fb789673e85f6c1d56d40db1e10. 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/QZTAZ2404064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4357ba644400df8c8933673527e7bbd134ba554c4f08bfc704ccca5b75b62. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZTAZ2404067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad81e577b044d34733c7ab1a95588971c139036d8086bc39bfeb0855faf69f5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NL1AP1948503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7a8af5160575394760dac774596a23810e8b2e76256976f8ed465a8b1e3c19. 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/NL1AP1976508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42685d4ab0b853a0be7f61768ca170ba13983beb06aa4022bd38cb059953f531. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NL1AP2019925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861cce29c64a5d6e7ef9b92d58c00f9fb9a905d2af5c4b3e90e4be65d9870d14. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SE5Q52004151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c436c66dd2511460863ac5bee8ae6b3de05f513f923291ec97c4e5362245670. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SE5Q52100771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea5448f7998fdd730d2f2a6b3123837cfc6de3c04d83860f0d3ed8308b7446d. 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/SE5Q52101483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deca5446638f6f3b3fade9584074e8e7259832e5999dd2eacfc64104f21b6ec. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE5Q52003769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991c7bd2f4b508329eb24bda09ec9ac8bb95e767269735d95091a2e27f810acc. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/SE5Q52102864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e611b3c6e239063dbbd7d10bfc05c1ec7b77c8a141cec72a44f6e3b60109b9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:04:12Z), 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/SE5Q52104056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15722daef4f98980257eec23918adc9bc323a2e50c97dc7d86860ce842a7a6b6. 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/SE5Q52104190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b019a5421f03f28a8f26858037b909b8570c369bf5f2b4f64012c84a6f8ea01. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE5Q52202092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e1db151c8f96d292f2bd2225672f132860da0affe7a04fb2834747bf3a689. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/SE5Q52202693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285d213bb2f74037eb263acedb1e9df82d0e969a67deacb242f80ec77a95f9ca. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB72203119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2d88d0ac45249249910e1cb84127233396880b195c1f7d29998217af98ffca. 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/QZTB72203120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be04ab4a46c424f3cac0603271f895f7d352414672f5926aaac9fd79fef0d25. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/SE5Q52300991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4efd33894537b0454440f0ec9ceaf31459e1ab512f522511e556ea1d5b5e036. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5Q52301324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6b93550efc073bd9c414bdd6baf4e1e6386ec2414e60434e62172c667bb7f1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:53:00Z), 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/SE5Q52303092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0520f92219dac8594261040848eb40e1d72fd004b01fa1874716980aec01ec43. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5Q52304422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2253610335a61a8195934716723f337b7c39b9f77712d95925684be21ad99fb. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE5Q52304828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8794ea3e5050afe6ab772b794290ecfff8ad7070ac564ce13c2d4d167fb43f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEP2414410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d118fd32710a92117e8634c6b489ed98ded4b453f555743caf950835cb501d3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEP2414415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09404a238cb6cf5258023d28b9e6b39cc17e588fc1356b2f976bd1f287379c6d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SE5Q52400988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390995c2ba4d7f8f768db22b7b8ac02d5c2fee6011090fe252a101a69864a627. 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/SE5Q52400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eee00561c1f4417a9e250d5effc8e9b29b843d9831e5a7c44ae76f250075fe4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/SE5Q52400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4efd33894537b0454440f0ec9ceaf31459e1ab512f522511e556ea1d5b5e036. 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/SE5Q52301324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be04ab4a46c424f3cac0603271f895f7d352414672f5926aaac9fd79fef0d25. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE5Q52300991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ebb9cf09ccc1969ce7f1e0848a6816d41cb7cf74abb9f9653aae2f0657d5aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:31Z), 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/SE5Q52204229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3488e3f392e1c7e29a812029b729f55837d450eb30dbcc3bba4ba36df295bd. 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/SE5Q52300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992a89edf6e94211781b6b791c597319e104f41394d0865ce72755098a9ca32. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:39Z), 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/SE5Q52204006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccbfbe0de4a16261bd6a9ce211f6685cf09aeaa26d27e6cdaad84f014c9ea09. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/SE5Q52203720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fd1d4e692db2c78483f1c07fa8375d90b3621a33210d491bc2d31ffabca486. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE5Q52202180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e1db151c8f96d292f2bd2225672f132860da0affe7a04fb2834747bf3a689. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52202693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de6d5c97e15645b29acf26145da8aef62cb7da9153a1377583d5b6248c1ab6a. 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/UKZGC2501328.