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 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 0xb8cdaa5b2d7632378445ee5b18d7df9fc8fd72a0edb8c01b37027ad798f69e8d. 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/b2e7857f-1f71-47d5-afd6-31a25decfc25.json and https://artists.proofprofile.net/proofs/artist/b2e7857f-1f71-47d5-afd6-31a25decfc25.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 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 0x49c309b1d44eabcd4a28d8b61057bb275953f565c0db413bae6674ea8cdaf0b6. 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/BKM2L2300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15307b617baca5e6cf6cee27365f13b4a7b6c68551bd766fd6453768572e5ec5. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BCM9A2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab64ade6a73bc0be5e59ebfbf4cd55b6cbc74464a1a0e273703176645c544a1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BKM2L2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead5ffae1e4e109ec57f97009ed57184c4648b1f6996427f35a110e9ff171f9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BKM2L2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905227f13da25f122120a5ad1e6c07edf9fe8dcb60f070060b182e323b49c40d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BKM2L2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b95d63933740225ad7d8f5ed9c2ff2e163127b63ced25ad32ae1c5653620ca. 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/BKM2L2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a34367359d361d94c44b2ec67cfbac12756731aee500e9551cba28a611835. 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/BCM9A2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d444d18498f2beaa05ca2d19384699a72c3bcd9f80dc25a8e63668ae0f1377a. 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/BCM9A2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70f2ea434106b5c645d91cbf435baee306c05f486aef50e7f547b162c61a69c. 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/BCM9A2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d26f8d0796b639ee0c729b4dd62e8ff0f53e7deacfa5dd7c90a87dcd5d0e7c8. 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/BCM9A2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43e09b6fd7bd75c2b3d61a5347ec07329cb65b87a6bea235d462f141a3c05d8. 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/BCM9A2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261bc362c2681da4813ec90fb9fafb32d597fc5ddaf4c586e8dd7015d252adc4. 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/BCM9A2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397e7e64f2d403c5538ada0efc21182d19604baec33f12484eec0c6899618f64. 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/BKM2L2400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd0dc60ece49ba38e24b0dbccf572dd24a6086d5a6ecf9b84d394d439682467. 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/BKM2L2500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc155688ee6aae7364ce3bd6f110abbcef8f09926114721a9f34701b6e38bc3. 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/BKM2L2500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8a6a7ee7348354f378c392b87a6b6e91ec07e06c5847fc6cba00db4ebb5da. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BKM2L2500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6540503b8fecc2c03cbf257cb447d09854bb45cb1ac3e7867f63ba95ddecc078. 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/BKM2L2500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed2ae848368d435a8aad58a2f83f9791b67798f263980063960be7bca4a8198. 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/BKM2L2500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d8c9a42373980f8ca506b1691f410c89bca58c29892e06391c5b8bce9326b. 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/BKM2L2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f81e0e33cf5108f71ffb2efc7b704459ee21f67b7416ca97e598a2ab7f7ed. 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/BKM2L2500133.