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 0xa9ab34dbe9bb900a358670eafdfaa6dc87d495960570dac72650e2979c77097b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ca97f6f-207a-4eca-951e-09774c9bf9f5.json and https://artists.proofprofile.net/proofs/artist/8ca97f6f-207a-4eca-951e-09774c9bf9f5.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 0x142ca46204f043e593c6232db406e5a0c79ac8559f60552f903f25a42b2621ff. 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/SE6JD2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3513e162c44e2bf34190d21dff2f244962094d5823d9dfaea5c33e226aae3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6JD2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28f78746529aa2b033a577d5097e9ae684016b496eff7509223740770e7711. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6JD2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76121f9578f7bd5df7639cacd23a846e87292c6a3c8ac12d45d2e85151f2af8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6JD2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139b33af71bb5c94048987c8362f6513fd311971abc082d3aeb0aeb9830b7a50. 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/SE6JD2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a692647a54e08519636e7aa6ee0f2dfca179cf7c3ac533e3cc49790305afb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6JD2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d5c4662a040d372aeae7bc44fb50b5009418f5a9f311b91f13ae053aca080. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/SE6JD2100001.
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 0x7c04d602645f5a10449739490e53e23c3d2825917a81c9eed6767f27253991d5. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/SE6JD2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4f245933fef627dd97d93eaf0059c782e48f4e5a0f78b8a3b3ebd1ed21e54e. 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/SE6JD2301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c8b907f9da93fe0dc1e092d6caf02bb542adc6981f99ed4d630e43ca072de. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6JD2301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4229e3363d146113b9464f521cc6ba9cfce7c1f8920102f784c8b83cd7998c. 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/SE6JD2301112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c042fc2512cce464f581176d98041272532ea5efb86288617a057776ebf82. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6JD2301117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2e4e6981259b91e25a7777733c59fe5a15f9b413e1c87f7f2cd902f96ced5d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SE6JD2301119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51aebc8badbcfd0cf8f0105fa2b054d0d49f3cee3e0460eadf78f77b46be54e. 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/SE6JD2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46686a42de540f67e0203906306123345a4b356481144c1a6b8688783ecbd348. 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/SE6JD2300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf2a3c7bd4adc7b03eaa19c9e62fec4c9fdf89c596b88f10c1b82b3936a87d2. 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/SE6JD2300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde3efb7d546e1a2f5fde2533347b0545a0fe51a62a23625337d6ac892e8470. 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/SE6JD2300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3e6e4c0f216bf81ab806237e5448450ed1ceb27b161603fd4ccd0a106b9246. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6JD2300846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619cde1caf96288af107dea3ab2ddc5b9bda8603dcb99f4e8934d7d2870a2731. 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/GB8N61224609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449e26ba05e20c8a6191a4bc71fef168f4f39a0559bde7c3662db3c59a2364d. 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/SE6JD2200797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356c5e3af20819fb9c6d81ba1e5884ca52ac8b9466fe67eb2045517f0387ca11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6JD2200832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0904366bc8b46134349fc7f393652991c85f73d63830b99ac64775ecf7c8ea2b. 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/SE6JD2200856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba2d961dd28901245375037fc23c234f7c196a0c54f2b92db6c8599e616977. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6JD2100824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc441d815b9a5b9be319f638c4fcf50914f4416ecfcfa2f783a8ef440e1a26d03. 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/SE6JD2100799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb54b040e821481e4f4c778cbbb94282ec4e4d331f352b620a1b80b23b2b3. 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/SE6JD2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa8388cf551db76841f2ac86fef82e8ddf99489c4090cb6530a44578b1a5a2c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SE6JD2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c8e0a7007685a04d33208161fd036450955392966caa2510df4ba5ffb7da6. 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/GB8N62009006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce093091fab00ee79524c91ccfd045181080a38a25a7e6f7c2e46645bc13a6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAXQ1612005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3097889f73ca0bf3fe0eec1fa2d3674bfea2d4b9f618d58dda22bf44b18b327. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8N61710007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae69c8011ce24a41249c9af7d681a99474cce39010ede518804914c13bebb28c. 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/GB8N61023307.