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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0362c904d35f084cb4a0220861fbafa08d5eaa0d031bac9db9f4c985a739df69. 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/739b8217-e259-4a5d-9e63-16147a81a0e1.json and https://artists.proofprofile.net/proofs/artist/739b8217-e259-4a5d-9e63-16147a81a0e1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8342397989cdfe52777efd90c00dbb7438d55b85859e98065f6bcb5c5bd80d. 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/ZAB7A2300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa3fdc6202e2b951921f843fe059ea372531dddf6dfea0a78ee158027fa37a. 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/ZAB7A2300611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212f3a4e3addef44d65c1d720c2b40fb0396e9d33ccaa6db858942c13ac25fb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ZAB7A2300612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f1b49ba7e55a1bb7c4fc3ed90e9f5192ca96bd7b7fcd1c68b2b666f6fec61. 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/ZAB7A2300613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43db15a310daa61e9c47714f265b774697a19eca72a6d210b3e1cd62d31c660. 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/ZAB7A2300614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54e3840ebf32a33395beda5474a2915159c39df96b743f0d4de0449e609fc45. 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/ZAB7A2300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a91d8c0f5fdbdaa0ad579175e14448263d05e4a9a65b3c9c3312cbe12b5d06. 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/ZAB7A2300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f6076ced387c7aa6ca582bb783a3bc2871e02941df05d38a42b6d6f4f02934. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ZAB7A2300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb63100621dbf2f7196496a075b6141bfffc1bec469be48b31ee12c001cb0b6. 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/ZAB7A2300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7cdf79d56b16c3a5a9943df6de5855ffd0fc82d47bffe420ec7f7c10ffb42. 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/ZAB7A2300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684050f1496da1eed29f90bd5e83199db93430e7a4ea21d5e9e2a77dd050b60a. 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/ZAB7A2300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce0bb588108543c250cfc1e12e48a02a4156216c48a301463e284c65f899c3. 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/ZAB7A2300621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93b8e3aa36d2be82742fb4f9322bb3009819420b457433e244624a5348f840. 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/ZAB7A2300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e23ad2a4b62be685bf6bf276d948adbef3afbd44d63479aa3377421f5d84e6b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZBBGA2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a29d95fd213eaece7d2500bc1654e8dfc76366c112309f682354d02c06300b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZBBGA2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6805361c6b58fac20b7931bf3df5185a1de2d5188b68bdd0b11f3390e75b7b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:28:30Z), 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/ZBBGA2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9705959ff785f33fce435ebee0a6b6e159cca286e57d35ea3293e819a58a83e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZBBGA2500005.