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 0xd24226ffc5f5cfdaefbabc8b7f9f2775f5147b4b335242b615c4e8c95faed934. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffa77313-a0a6-44f3-b877-5ca9bee8d6ed.json and https://artists.proofprofile.net/proofs/artist/ffa77313-a0a6-44f3-b877-5ca9bee8d6ed.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 0xaa2e0a16bfae3c3218329080743fa757c1912be95db87d40ddf725b916be3a64. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:03Z), 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/QZTBC2579091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4addc0d3aec3ac19572edd47e342233f8f1018955b40baf0b8114bf9f0904b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBC2579092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493df5dcf1b4af08aa7169dcb30ca1e6371f8f97dd11d78082bcb979bc34c2e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2579093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf4e399651f712933012ca3bab01d1d5f044cc193e3b0064d952cb900f24920. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2579094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2ef0a614b3d85b0ca2d65533f9008b8bf4adcb4d90eb3452c519b1ed4b0ae6. 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/QZTBC2579095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8a03f4ca40edf0273426f584b9cdd10f1b801a8b33813ef3bdf5e0343d554e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBC2579096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae9b418c30c59b9c2605eba3322b318d3aebff0f9804b0fd72793d8b8d0f84. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTBC2579097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab22146f1bac66a0670656afcdb7070ada7a33651ba92d1b9c152906b1baab. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:52Z), 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/QZTBC2579098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5923b25e5febb344ede8ef43c1d8d8f28e504b301cdcba00a0bb762abc681eb. 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/QZTBC2579099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2337a908ccfe510c2796c07b9ad5eb20fd7189b3f4da992725256c53967438. 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/QZTBC2579100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b4033068014fa7d388ba295827ebc3213316f3d75b7f23a8ab8eabfefc875f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBC2579102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd5189ead0b7fd8e77385412f43ea04ea70150a96dadbd32a6cbd5adc13af7f. 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/QZTBC2579103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437a54aa8ddd4737eb3c8876e1f5f21e05067c5f51241f3188341263d46df83. 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/QZTBC2579104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6822bcc19ee2017d95a38f65e24ee2f0a7053756a62a4683a8a5aa40139a6e94. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBC2579105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19aaa4ba0d8d0e69de0ab3c7fa787f29fd6a10a514b78cfb65aefffaf46a23dc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBC2579106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f7cf8c65989568c181af7e82a800907e7151e9e17fa7a28e8432ce7b10423. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTBC2579107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28882a519ad663b646f7317ad3cac1eeb44da1c86588fdf9b9fe27332b983635. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTBC2579108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95483bc23337d982f5244f320e80153cbf02bb9ee914ac48d391997b072e6728. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:49Z), 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/QZTBC2579109.