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 0x8fb3d43573165f7d33e51f4cd82a2de7083f13985e87db879f5b86d39f29fc57. 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/d7a97323-63a5-4278-a9bb-2e39f5679b2b.json and https://artists.proofprofile.net/proofs/artist/d7a97323-63a5-4278-a9bb-2e39f5679b2b.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 0x062e8c7c967ccf35cc51dc2059eaeafbd98e4a6dd91b3b54d734bd3068a0427f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/CA5KR2068485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25804827cf0ec2db313a2bf8820a75901baa54816fda84b795799adda686db97. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBWUL1580740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfac2f6109dbfc2c55e7646db78be7b9daf5b864f013941157f54c66c314c51c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA5KR2046073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e06cb364385048efcf56442bd8eda41f210acdb4c1a2cd14d26012cf8e0cd67. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CA5KR2075298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04af03b33d5c4f90402722eae90e6ebcc7d26eac4f14dca93cec9d9a9c82fd2a. 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/CA5KR2113627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5753e0d8ae58286b2572c2b74ac0f8bb77a1b0723d1f69fd4d8d32287a3baa3f. 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/CA5KR2116617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c9e66da462eaba44d18cb27038ea4070f4ab3d14956f82da3b76542f02b0b. 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/CA5KR2170980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072deb851b8f0e473a4b6c0829bc40f97959e0aafaf6680351c0909d284db999. 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/CA5KR2284874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3a9fa6b4226a3501e22f44c5ef1e790708decb1e74265bfdd1b33e5071494. 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/CA5KR2333988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780a6ecaed227d3ee0727a5ff7f361288e48f9ecb234233f836901630fa92510. 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/CA5KR2354768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f6be4ccbd64e8d49ae29d27842b7368909bb88ed5118f242afa02c2b52dcf. 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/CA5KR2358677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf748d430b5f25d29261ef1be296ca327d6ce3196e9fe2c4a8acba337bd38988. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2366676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7be6ac3e631b16dc12bed630894287976d09c4122c7fc601962d0d90bf4c887. 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/AEA0Q1802184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5c341abfcb70a59e8a14c9ade85b9c2d66be051d49a018799887586daa8b90. 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/CA5KR2453367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641148b2c69067592ba6ade00be28389a2ef0e44ff740c2547bcd897aa2c6808. 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/QZG2X2408513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f174b359661b9b2358a5b183df3ba9f2229f7c53e1f48812f04373360d17b. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZG2X2417306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11b4bb915d7cd695c0338ca26cbeed39b42b462d038daea149a64888e661d6a. 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/QZG2X2504479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43512c919eb781792415ab243f9245f0e4890b43e9d066d74e1b99927079056b. 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/QZZ8B2426371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d92b1940dd1b6298f9167e410feb13f638130c1519bfc8e07fea417027e594. 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/QZZ8A2429014.