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 0x88dbfd078e0941d761051ff4c32b047d9b93a6b98af66ed6702067a539811f21. 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/2e8f9459-4770-45b8-8e46-2ac72d859561.json and https://artists.proofprofile.net/proofs/artist/2e8f9459-4770-45b8-8e46-2ac72d859561.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 0xec9efe19f351855e1aa46b39ea09d6cc26bc5b2edb0fd4e9e63371fdc97185b3. 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/USUYG1142042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e21ab3c40f24c27a9955afa28e331768434ea5b1bc1a10d1f80756d0ec673. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QMGR31934274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b4258e7aaa77c876fd724aacb03bbc8cca585e4487de0a3dcfa6c90cf93be5. 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/QMGR31934304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144c093d68a773107fe7611df18ca5883c79ca05581653067ca962398f3dbb5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMGR31944793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370262ce2f2a98f5528fb1857eabd403292c47b7137106cd6bdd9dd30a076794. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QMGR31957084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f40f11cbd4a57f550676472b0928f5a2117aee3895a5e3a6f6519887326bf7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMGR31949567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca86112b0c03d73cfff5c85e10c93b347c181b848279e130f9ff406457e1f77. 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/QMGR32019432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98057b54bff4eefd38109752e761cd0e00c40a07bf38b6afe8421f71b34bc0d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QMGR32019437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435d6b2c0cabbd5da3cff909206cdcfe27d815cfde31393d36561ea22e472a24. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMGR32019428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd29f983b95eae0c64f6e3fe77dde3ba27a2284ea3918a6af9e2dc7bcb6c555. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMGR32019430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93ef1aa445814c29aeb4909e44b6b5839c7117f99bbb6468f137864f07e5a5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN31947882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f79c8c6e9ff796f7089ebca9f0c6540878301cb25e5bbdca600245709b10485. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QMGR32041831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b0fee32a86605293e876f3a987363f8d7e980982f0ef2c85718045213d7a30. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:47Z), 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/QZFYW2072094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb50786333c115cb060fa575784ce1a906f198c9880260057f8e90bf9b45d4f. 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/QZJPM2000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b0ed3e8b0b57684cb8feca0728392930dd55100c70f90d7bed77349feeace. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMGR32294835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc686e81c4ac858a2ced00939c7a3ffa10dbadd472baadbcd4174c7ff23187c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ5FN2287378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7127a826e6099a660b3ce8f0a7f21c1aa078af6dc78b72cf5b68e81b2967d52. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ5FN2287379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a807b12dc1de69e5806e1b06e5736a5bb21cf591ad63841f89270bb277939. 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/QZ5FN2287381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0951ffb17af4a408b7892e69dca98eb10a64a3f00eac9b196d90e037e0157cb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:22Z), 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/GBRKQ2283171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d241fdb7b38bc8187f7a64ff82995c209a8f6b4dd18a587900cda906446950. 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/QZQAY2308024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2009dd24965b4b0a2f7e0e04a66c5c19de4b7f524f11542817a30efc00e50b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USLD91757366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e74af34371bc34563e3acb0a6dc80af9d2259587cc373ff494a4aade6b4896. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:47Z), 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/QZSYP2450624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491448417bad1b01dc510e7f2711aef37f1e45837fc0388ee935fb1798fd091. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTLA2559089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab887c4186a63cb03a4b6a68e3c70168c889a1c601cd7babf8b594b8ab4195. 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/USUM71608382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab887c4186a63cb03a4b6a68e3c70168c889a1c601cd7babf8b594b8ab4195. 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/USUM71608382.