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 0x0aef1c3085a2c1332c23e73c59c63164c321015e6e6f0f064c99b4e4e966bbd3. 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/900e5bbd-6c6d-4cde-9117-99eb6e053015.json and https://artists.proofprofile.net/proofs/artist/900e5bbd-6c6d-4cde-9117-99eb6e053015.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 0xfbb87b64a15bf8b63c022b948508123a9d0f8047079fa500e82e29506d776455. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:16Z), 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/USA560766097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ce6f3582dcae9b55b03cd24232b8bccec5bc1be40fbd40f2c1993d81f4e78. 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/USA560766091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f8ea4f4a3900f5f482bbf53cfc0b08cd9742ace4550f5065ecf01fb304bc3. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USA560766100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653559c943582dbe78ff0a2ecd84ee4348ee63ecda3e63a979bd9118952b2f1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USA560766095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe41f57fc002781716e8a44e7dc41d424ff71cd47caf98b2744c40d007ab968. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA560766096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ce6f3582dcae9b55b03cd24232b8bccec5bc1be40fbd40f2c1993d81f4e78. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA560766091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e1f0901a4ba64beb43629a0829fb5dae258c433d27835f2e13391f78b8992. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA560766092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653559c943582dbe78ff0a2ecd84ee4348ee63ecda3e63a979bd9118952b2f1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA560766095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb87b64a15bf8b63c022b948508123a9d0f8047079fa500e82e29506d776455. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USA560766097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f8ea4f4a3900f5f482bbf53cfc0b08cd9742ace4550f5065ecf01fb304bc3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:49Z), 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/USA560766100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819957e193fe3b48978cc667df65dfe05febf25f21de8afa1e1140852e6b1588. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM4TX1732515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673820e01566a6ded587f453e07c4b87b45aaf5aab3fee81e2de59d2a0442ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA561217483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e7329588b4c7247aea691f0598c51c2f1b41b9299cca1217d7356c26f821d. 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/QM6MZ1729079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726be73a9d540bb8713fbb36a7e7b6b00d86b80a05312d974e366a85b7850dc. 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/COA721500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f42efe0053b8a227cea2b6b076bd5c53abc591ba31880a34763c8a74789d96. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/COA721300958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0726c8f0c6fd31843b7dae8b6ac93279d6203fa30c393038edfb383d1fb4170. 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/ATR981211082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3ab7179ff6a98babb4ca9af81ac44e2e24deb188906a6154176c28d951f336. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA2M2378634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b1fe960d19cf5ab31373823951aa1d4066cb2388f6ebf56fce44500d2bbd82. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZQAY2595679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60281170e0b33ed239011560bdeaafb07f00124e180cde0838d8dea51edf05f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZSYP2508315.