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 0x8307c68dc086704f13c317622d93c06b8269d1f770c8fc771670c503f32e30e6. 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/91ebdcd4-c910-4fcb-b628-cba092d28d9e.json and https://artists.proofprofile.net/proofs/artist/91ebdcd4-c910-4fcb-b628-cba092d28d9e.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 0xcc55548d469b9eac5aaa2b7348b86551862f4d8fbb72e978cedafa6b7e9d517d. 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/UST8K1872902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ca349dcfc3a834c426e27c8ed83e92a610e24e0b79d0ce569c1ccfed954d9c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZDA52039491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b94f63cec264c719e344c5eac7ad11e42721caccf1929bac06ce789e846e1. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZN7X2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00dd31703cc1c64927cea799f78164dc86d89f21174377e133b1ad90e579643. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZN7X2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce6493afd54aa7a4d2a7fb9b561f606a614ef638b7cce983f369ed839db21e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBRKQ2273365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdea2bf95ffd3debd5bd9fc69817a6480942762cae5a50494adcd59761284e5. 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/QZN7X2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4103012d8c5b825b2b992461152de770b24c2fc406916274fb29c928152a4cd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZN7X2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fb76724724528f434080cee2e96320c8d35cac8bcd07e4a47202ef1fee8073. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZN7X2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdea2bf95ffd3debd5bd9fc69817a6480942762cae5a50494adcd59761284e5. 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/QZN7X2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4103012d8c5b825b2b992461152de770b24c2fc406916274fb29c928152a4cd. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZN7X2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096bcac442e1536a5efc7f3ab4b69a52f4c681fa60c3518ccae6d5f9fbc423e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZN7X2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096bcac442e1536a5efc7f3ab4b69a52f4c681fa60c3518ccae6d5f9fbc423e. 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/QZN7X2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615dae4b48e456f52013bd04cec678229e8704f54cb2ffd56dfe36d75b2c8740. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZWDD2382758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866630d67a1112a499ebc1ea1030ec5bf43e8e505fbdf1683550cf09f5d21cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZN7X2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866630d67a1112a499ebc1ea1030ec5bf43e8e505fbdf1683550cf09f5d21cd. 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/QZN7X2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872a5cecf057e9518f9f6bd8f1ee5a90803cbdbd9b54cce7ef19261464c7b5ff. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZN7X2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ca5046ea637d0fa6e864d4664189fc0359245116bc974ba2ad367f1daceaa. 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/QZN7X2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63beee4b98908a9e6093190f5743276bf3adca4d50de5c0e54dac12060ae6ac7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZN7X2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f5bbb94cbc7a1be9a4a67708930a167562d996ce9e4ea2a82f9a30c78db761. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZN7X2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b97cd8ca585aeb812134e46b664886496f4dadfbb49194338294c9c34da22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZN7X2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03f181067a1e38c1e9e1ba2e0c80ea3eb557d3f4b25e26f44214b0e28dea8df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZN7X2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b5b79ddf1b0ade9605b646f685cf39626f4f694dd4c1d912d8e206ad12679. 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/US6QR2400118.