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 0x84244d9c8fc8c97290f82dd7913f187b9f947b53f4fe4e07c2ccd84f89705ad5. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5117a77-7cab-4745-b926-1d3b32bf2cf7.json and https://artists.proofprofile.net/proofs/artist/c5117a77-7cab-4745-b926-1d3b32bf2cf7.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 0xfa24b83f6a5061fc67620b75443996c8a1ca522c13f03e2bfd3edf809fd48850. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2236678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd29a988be1288ee9ffcda3991cf2ebfd2ed635bf403c8688f6eaca49592d8d. 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/ES71G2236685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf79b04813616870a295cc9c2c389c6dd9f30d153435ab679775045a6c5f2bd4. 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/ES71G2236684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acd743dc2b22ce9c754ff650503fb260d3931493ff8370feca20dc930757022. 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/ES71G2236681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fba2b8b5cd8f7c6eedc17953c68d2b33b827f1e6efca747d53cc19ca7ba841. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2236689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cbb8784c77968a8289526c20ee0857c1d17959a0d164fa9a95b689080b3fba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2236688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f625037439f7a98d0ac00fd2f61bb2526ea5f283821427b546d36421307d81c. 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/ES71G2236693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29080b8142f9e2b64b06081233747fd12a4650e85f46a3c18fd16f1d89a1386. 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/ES71G2236680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77e8bb7b32b43dd569db7c1660693a819a496947556913a866995800e613a5c. 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/ES71G2236691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf9a90e23e136b88ca3a2ebfb2b8b4487190e6af48bdf329fe1c4245e97587f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2236682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8336991d4b9aebd1d67e2546709517073e34bac0bd99ccd29f270f3504b2cd3. 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/ES71G2236679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c294245cddca107a50a5ba799a802b6db42ab4745fd50414bf0d281548e5e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2236687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfa850db985866ae76169ffdf0030789ba60fb0183b02244cad5792c602e1b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2236686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a798ae6f8fa49b46cb890e005bea2afea38b4739ab88ab3289cdc9ab98989c6. 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/ES71G2236692.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14c103eef383912abd12c14f6eae474eb2c9dc33407a18a0da27c8c48e622e. 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/ES71G2236694.
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 0xfc363f30a8d3624e1101519b130ecbcc0831de836bbd21620b67080ae767dc62. 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/ES71G2236683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e7651e7c1c8d006d445a96555d5d97ed4ddebb0f9da225828b282181ef150. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ES71G2236690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83afbf9a07a48f72986f4d1130f4b229d890a50d655d28f1081dd95c420131d. 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/FR59R1617538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40bacc9dba1c21223beac93422c83c871bac0839323a805e3788441ef2b6c4f. 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/FR59R1617540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74da250d041a35ed12f7821f65a8af14215365e3aa8f675f25cdf27db188586. 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/FR59R1617542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06415f6bb0e82c7e2f8bae65249ae7cee3e52ad35283d26c682d41a6e64ccda. 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/FR59R1617544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e16db794bc46330c1f4fbb9d81f60aabac016dc6583cf4f9d6c1a2d0ca8eb6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R1617541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee99f0c58eeb69389382c619a62c3dca314563d65081e7ca1006e6040b666b0. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR59R1617543.