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 0xbb5f82dbc0ca651c0ca46715ad1574c9c12283eeef52ecb6c4990856dd9b3d18. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5475208-7766-4a1a-97e7-f29e178eb05a.json and https://artists.proofprofile.net/proofs/artist/a5475208-7766-4a1a-97e7-f29e178eb05a.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 0x892970be4ce63254b2ebe8c549b9ad7a3ad8beaa411547e8d9f1285a4358d340. 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/THWTD2125700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312fd78ee6a86af9619a4bbe936a8f9576447f4c3a72131244ade72556fa50c. 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/FR59R2128360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce168d8e31b74f267947473d736c2d610cf5e3c7ebc9209373c5544cf90c269e. 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/THWTD2013600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c267abb4d3bad3d3c0246ea5843360f8a2227b4fec28b6f140a3c269f3e325. 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/THWTD2203900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a4b18ae98cb56d7e1af8b821bd68e5fda3a21157a8083631cdc518e7f636e4. 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/THWTD2118000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fea424ffada8a54f717e8e3e1c07de30e0af0e3b2dbcde097b4a99a19267170. 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/THWTD2007600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb359fa8db69be60ba5d64d859384b3aeea8a8426bce19b99c529c072eb3c179. 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/THWTD2203700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750d7562085e99a40686960f98916e53089348bda9c0b397d8a59b31127b270. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/THWTD2203800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892970be4ce63254b2ebe8c549b9ad7a3ad8beaa411547e8d9f1285a4358d340. 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/THWTD2125700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a4b18ae98cb56d7e1af8b821bd68e5fda3a21157a8083631cdc518e7f636e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/THWTD2118000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312fd78ee6a86af9619a4bbe936a8f9576447f4c3a72131244ade72556fa50c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2128360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce168d8e31b74f267947473d736c2d610cf5e3c7ebc9209373c5544cf90c269e. 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/THWTD2013600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fea424ffada8a54f717e8e3e1c07de30e0af0e3b2dbcde097b4a99a19267170. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/THWTD2007600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40eb033df2d1c5770a2c441f61d2614c4e80e5fe761ff0f33f1d55db5f66d2e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/THADV1501449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8185d52b0863a13a866f1cbe0c2581b1f62145059a1f902fd445be22b13d5583. 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/THADV1501299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5c4ce973328332f00e6f15bcde94357b6cb2cb7747a23c597a14fb2bc2f53. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/THADV1501067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab7aa0c33685416d84396679c30bf539c8a170bc76e11e931070d96d3cabbc3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/THADV1500923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b744e57e9903b3a880bb0ff792454ac03523d09c5f8723d04b51fc18469fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/THADV1500746.