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 0x5d5f3d0aab509638d73473066e75d3e97c23f724795d703054d4315495ebe7a5. 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/b5916e54-ea1b-4427-93a8-01cf4ca78d61.json and https://artists.proofprofile.net/proofs/artist/b5916e54-ea1b-4427-93a8-01cf4ca78d61.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 0xa6be0cb63b7411f8bf02d7d66f664a4ec302cc05cb3155ad23d2b6710d7f3d04. 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/GB64X1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c658797779ed124393a6210e2712cd89f3fa6bb242d42ac0d006d4b76672a5. 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/GB64X1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1ecfaaae0d1e584926356097ff300ce695b4d5e8a0e4f6472f05351530636. 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/GB64X1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ff6abfa25cee95ac141e8e44dc02df0d4beb53f92c84406349014b5aafb2b. 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/GB64X1800004.
The Legend of the Swan Brothers - Windhorse Reprise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9585a1eab39324ca2f7a7418d8e45d3590c8a5d57d370467d5a4844010e4372f. 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/GB64X1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c395aec0017f0e1f2eee89141e7ca47a39cc9bfe8a58c9f84f29ee2e6602b. 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/GB64X1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8807d4b0864a50a01ff1256bb77078a0a1f782b1ddef51bb5dbd4ea3ac35aeb8. 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/GB64X1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbd5873b3399efc04999f2fd386e62f99daec263290d1ab29ae9de9d72148e9. 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/GB64X1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b9601e612e3a7fc32dc39f5691ac30b6d131d8d20422e9e045f7c9390187d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GB64X1800010.
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 0xd9cfe04af469dcb61e52deffac717c25daf2d2af7fb6c3e31c337543a1c3eedf. 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/GB64X1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9ed6278db1c7852f6bf282b0e85c71f139d7318208e5abbef2f7bcd208ba50. 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/GB64X1800008.
The Girl Who Stole Horses - Windhorse Reprise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557a91851c2cc5b1836e401a101d016433d2e6e4dd9fc4edfc6f6ffd444aea23. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/GB64X1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0a697110b3d909d1074a9850104f2853bdd367761c4198756aa1502588d2db. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB64X1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2760149c2102c40f47d410ff2bb862aa5aad36fc976f16b1252d13710e5b19. 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/GB64X1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d677aaa5e7e9a3f04e7329516ffcdaaed406e3a2b7ba16d7baa35f0e7e754c. 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/GB64X1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb1ad59c42c8e2012083e07b84949857861f2f8587729fadd0038f40864243e. 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/GB64X1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f85bff6a3ae907bb767cd777ec1a7da2e9e99bea2eb455ff0c98f0cb9bbaf8. 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/GB64X1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca6c563efa54cb637b3d867753637766f049df639c7aa6ebe10e1a3df1ad74f. 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/GB64X1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa742fe036b2ffcc79b413b4fde1e7b384b949c0aa369edd2a26679bb592d690f. 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/GB64X1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf9aa1f06c2b585725f57a9ccf4d6152ff10657c281765954c93736b0bf1ef. 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/GB64X1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee713885d163154fd1c8913dde50e5d82bba5ecbe3d6f2808943d46e6cd84070. 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/GB64X1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732649b66a47d7d1df856f2c8fdc2afa3ff8f9278c6bba7a95964e584eca349. 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/GB64X1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa31ff02069d4c408732dfd1f09929d5164b51642c5c8fc739bde1250069ce2. 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/GB64X1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66151b1451fdc8fd782e0716518c654f27b4b24a0e4acd1bd3912c21eaa60576. 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/GB64X1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf71fe691d1e9d11d1401f620b72b70e729f5dd41a79b847da7b9a27864c983. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:33Z), 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/GB64X1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a98a4347eb59d15b04bd67a4bf5b42f038227906b7755d39d50f497c2d7ab73. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GB64X1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431905497498ed18d2a4f7e198b5ff0c50129380aebe076d2ae0f9aca98b576. 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/GB64X1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bdabf22ae4dd17447defb71dac9f376aa24a6b8b51a02ea4e3d1ebcc2c16fe. 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/GB64X1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0ad7ae9c710a5280155e8ae29961a86294b0c49ddb27719777ef45a65a77f3. 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/GB64X1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d506c8ff5f6c6c57be4733dc0c772fed173a4474c0907c71064fe2fe98935. 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/GB64X1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e5b30dc5e292ffbb621cf6a1431da4058d22d28d605c9ebbae57595e7cb94d. 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/GB64X1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c00b5bbd7f773dd2613107ff3e9eaadb65b23b49dab93042cc2927badf244da. 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/GB64X1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c1ce94af6311148cb58d3283bcef7d06a01f01ac80f93dceb05184a69582fa. 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/GB64X1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e01a832ad6cf273390b4a3a97381d40f8b140d1e1a8a992f4e13bf1c380e3a4. 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/GB64X1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1480f542c40dfcb18b8f92c3e89580bc75d690ceec93e33ad2941262bf2b9. 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/GB64X1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9609dab5b5387cba2857ccc082b9b23a17c0f7fa500b71aa5bce7b6ce2e6520d. 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/GB64X1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47775e77c34ad509b3a1a04124f9334981379f0c7137c4331e7694e36382951a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB64X1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d3645ddb1af90f0a69cce66736ff280d9dbc0b7a35d16168292377ee56fe8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GB64X1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e995593377e1b556f6a17fda1628be5943915361bf05699b9d616a5373b1c2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB64X1100013.