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 0x5007680a31a282b1184f28001e2ee175237bfaac4f0b83500cc46d278d11d4d0. 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/fc17546f-2179-4b96-b394-254f92018e9f.json and https://artists.proofprofile.net/proofs/artist/fc17546f-2179-4b96-b394-254f92018e9f.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 0xf8bdb91270736fea109f385603101993358aefc7c260f3a52b21a21ae03357f9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:04Z), 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/QZW9M2284764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d58c5b0cd31dacefc577d0db7c0123d1566d783479d24b293bd9e8c12b9dcc. 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/QM7281877971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f0efdade97dc9e2c6fe395f3d1c8e30cd0a15a4cb9b5406e01448247d496af. 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/TCACT1607153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8150f44fe5dffb0c2d0ac698be5655557fc3818778cf0049158ae456911e5d38. 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/TCACT1607157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f8cfa7a2aaf11e093b7685fffa7eceae0dca5508d557d3825dec5869812407. 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/TCACT1607159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efc09d3ef3040fe63886480867b6ef141a6b5d2f7295d7b224ec1cdf3da0761. 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/TCACT1607161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a6bd0a6be1c702d1431ae6bf53abb4180a4197ab719d9b9c4693307ca26e5. 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/TCACT1607166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54e23630e355dfd4834eee63f32273240b515af8514f5ba56071d58fdb6d0ac. 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/QZGLS2368291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b083f3cc1ce10ae998393d9e76288b1ce41ca6d2bc257a90ac67ed49e97f78. 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/QMDA62164116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66071655257e14e8d3f753ffb872b4831e3ec63c8b751d7186556a41a8f0a11a. 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/QM4TX2108297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269b7b987071d64bce26aa15d3e276b6bce91fd3b5bf9effb633044b291529dc. 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/QM4TX2108298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5744c50ad96bc59bf908ee94be496b39a26d1925a9e476d240aa159b054bb6. 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/QM4TX2108299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39114a127a912e27e7925192c5864b07f0ad8d36eb52a51d71e63697d61b44de. 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/QM4TW2150936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf828871b3d00151ec2bbb19cb9feccd023b31f0b6c1efb3c832981952c0285. 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/QZ5AB2457546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee7e72d4348080bafa685f77906ee8d01e2190e8c1b13a5833c9f164a5f2df7. 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/QZ5AB2457547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eec606497078a3a282d40e2e504dc6b5c698e7c64b1e48a1d8d23cee3a69f8f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2457548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cbe7dba03377f4317f2a4c5d9a0df97fa9c070254e0c6f7b2d7b025d17683f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ5AB2457549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f132b846d92b49bfd5a06951a22d8d7c7954af74485e19aa610dd13056a437b. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZ5AB2457552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5acff98ff7992261aa6c0a1749ff1edbb7a98182f637f356a1ea589ae6eb925. 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/QZ5AB2457555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2423ae7957ac8f68aa596a8ee5baca4b5c13bbc822a3e4931d62e454988ad790. 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/QZW9K2395188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff27fd4de01e0cbb244eaeedf3df960b812dc0c13f0f458ced48dd0c97db31a7. 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/QZW9K2395192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8afd3ed82e210d603859674befb02cc26cc18b1f35bbaba86efc93acf81d96. 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/QZW9K2395194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91ed044eca3721e9b5414f8e0f4a3ed43567e31dc882b55e31471978b26da92. 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/QZW9K2395195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70762d1385f91cac491d174787bb53c55986069f74732790745eef683fc1d400. 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/QZW9K2395199.