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 0x0f5a7df4ea58bc25daa30d54968f7c377d593f8b923d6e8cd367aac29db172a5. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9ea4e1f-2f7a-43ed-a96d-3e00a32196d5.json and https://artists.proofprofile.net/proofs/artist/b9ea4e1f-2f7a-43ed-a96d-3e00a32196d5.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 0xe687fa3677592d0ac4903d1de10dff97b9fa00bbd3384d1bd54f649ec8746a2a. 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/NLW2R1721810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b377f0115ea00855e86760c5f786002bd31c6dd2ed348ee3a07f8f626973fc3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLW2R1721812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee3037a9a8380ff116ecb24cf961ad02eab01482b6867f6bcff4e8ce8173a2f. 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/NLW2R1721813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a258437edc1ad1b1df5bf24cd7fe45a5a1b21f86592e7113e4f12e2501de382. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLW2R1721814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e84a1ca2611452dd74ef88a4f9f69da09034599af5912bc510b090ecd689c7. 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/NLW2R1721816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b86b2e43ec1d397fa872780591a81ea93237e3fcb5bcf9bb34e96c788d8ca. 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/NLW2R1721817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2231d5fd5569febfa3123376fdc6e39daed29b2e5d49ecc2cae70a5738839450. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLW2R1721818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc6948048f97debeaf18ad02c9b5896024564d4eafe52f6f40fe5af1cbd8a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLW2R1721819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b421fcc1482dd6059dd236e62222614ec0724c97f23803c94e5147e1758e85. 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/NLW2R1721824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ae3e2292413345d788ae07ebccb9b043db48ad75fa437a89a34ebc8fae56b. 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/NLW2R1721826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6657b3b2a7fd854b6a74a4dfd424559e8fc14a9667b4869490ce58456353dc5. 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/NLW2R1721828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a118b788d75f3f08134dd94a01fe313f96b7f07e6d15f3be4e7f142bbb622d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLW2R1721811.
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 0xa703ea472fc28eac2d3ef175167d3795df3019d470f3fbd39ef2761e713a046b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLW2R1721808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1750c2cf06dd30bebfb367acc3dd918d73a5f74e4de8f5bec6ad866d61092e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLW2R1721809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec8f38f88cc2ebbf971603fa091d5dce8fee0cb433c6062adc9cdba980175e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLW2R1721815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1337dfa557af557ef86baa06f1a276c95aee23316e2a14eba0762cc87384c0d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/NLW2R1721820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a355ab0cf270c9279003aa38914cfbdd80f32a6ec61413935275d4f918cc2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLW2R1721821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b048e287c1cc81dc6e4fe5c8ec597ba047381df963be2d93959b87b8f1582ff. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLW2R1721822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149290bf3a16aa3be32d6affa2a767acdc5d6835f4dc35c0b07018798eb8dbe. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/NLW2R1721823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccd8950f04d00dfa0fd6eaf2f6932ffbec3cc57bc0f2e1f9eaceaa4bc679a98. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NLW2R1721825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2d52c91191910068b3163229e1dff27ff233ea6cc95b61856b18ab5419ea2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLW2R1721827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d3bfb3dfcd8a6d72eff4280a66fc10f0fe390d0d8672462f7d36cb4275926. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NLW2R1721829.