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 0xf87397b7eb093a8d72db52ba5e138b5ca254d0d93eea7b7a4e57947fde0a4113. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0740a392-3abe-4c04-8a66-95c3ba7af9af.json and https://artists.proofprofile.net/proofs/artist/0740a392-3abe-4c04-8a66-95c3ba7af9af.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 0x97705cc4f35914e5b9e0df135c9dfb46440e89eec45063bb6489f0dfab3ff322. 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/CA7911900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f988fc1747f30d57205f83f59bed29e5bab7063224cfb318a7062a12303df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA7911900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e23feae445a819ccaeccc719ead6e84263dceeb0d83fe8167e6920220ba159. 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/CA7911900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe97c09ae3d1c4d48e2757089b9e3fcee5559a6fe431252d46e6cbe6dddc18. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA7911900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97546c29f69370f4ad37f219eecedc5af233aa1687d61cfe0f7c31b0ab8afba5. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/CA7911900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329854e77801b464cc6d8d92bf962b4691e8d435d032f3321c9fba74f7c57b5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA7911900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6e62370d36113a9e6eb39029b6587ca875ebc2ba8cb78b6fe73b9d9724e41. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USC4R2109047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9d94db16c2d8f1ab9e6f61f61a5382db59c8018e09718d416b92acb745c3a. 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/USC4R2109048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1657303178be4ffcce2144be5e047b284e162433d4ca85c7d9a9745555e7bbd9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USC4R2109049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b1fbe34707d9f5959d503d6226feb1faafc7a773ad3d1d238716eca20c12d. 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/USC4R2109050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb06452f8fdc15e366631801ad575006afc6f0a1d29139894313de266e19ac44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USC4R2109051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742e53b7d9adf72bc14587ff0b7215dbe13b48e6cb6280ed7fd1be62799d412d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USC4R2109052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ebe62b759357c687b1b7d8792738e936e8b5f105f1589da4d13e476204ebf. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USC4R2109053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a274cb585b4b43c1199c6975e23b5a5f2e0d4c94dfdd23d2856c9877f4075f7. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USC4R2109054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c22bc622c403d570fa90cc3c040c578972c3a52236ca0659568b94c2b80f42. 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/USC4R2109055.
Prayer Of St Francis / Mi'kmaq Honor Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd850bd0114063e69801342f4877b7bcc4a5dbe36021f705885e9a26e264aeb2c. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USC4R2109056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1144a8c3e6a798cbdd097f4a8ec3aa9374977c528a8dae58658905072ce2e91. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USC4R2109057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee293d232c57cb10e31b14b8c1097487452aee3e5c4f6e318a4f2a6c2ce8342. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USC4R2109058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159582632cf9886125af8a26ea94c6a31d17d0528968e54f10d48e9ccfd882a. 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/USC4R2109059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab3604d72ec79e12ea742161023f630e61f2d62abe4c3258a7f4f1cc73750e. 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/CA72N2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c84c099d9b911c6f55aa41ea02262ddbeee3625a88fd1dfb5dc41f7a91ad15d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CA72N2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0c4c834c8d21501655f26e81ac7b1091128b49f0dee46f61b698a13618568. 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/CA72N2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86748337465f2773a98c117a7c44e444771f3d8606f30181c74110ef93baeea4. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA72N2000010.
A Tennessee Whisky and a Newfoundland Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33733b3b03dd19ea4f02ec9860b6379ac3b4a4aa0de86b79971b9ccbe94cafd. 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/CA72N2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab3604d72ec79e12ea742161023f630e61f2d62abe4c3258a7f4f1cc73750e. 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/CA72N2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ab89ad56bb5c3559e90fd69b0f817c1ef67e6340f66163191051e812440a3. 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/CACIR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d672ce72b1aed5bbf7edc0080abbfef20926d528356f18343d608a8b21f0f. 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/CACIR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b421b3abc6f16292e1038e3367ab1fcd32200d55669f7e837a1dc3a73cffc8f. 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/CACIR2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb20a4a9761e06d646ceab5e83985dccf94595f52f383436dab6ec882b5c44. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CACIR2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5b40d7e620fe177997ab205a8b84eb900f98848afec09bab382df224453f81. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN31944250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7910c8c6b17116f51335fa9f6184191d431f82894710bf9d41bc50f947717. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CBCR22300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea246ab213d4edbd91ff4fb9ed345044f80d26f45d5c6c6a757a70f3e2a0a8f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CACIR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ab89ad56bb5c3559e90fd69b0f817c1ef67e6340f66163191051e812440a3. 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/CACIR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d672ce72b1aed5bbf7edc0080abbfef20926d528356f18343d608a8b21f0f. 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/CACIR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f77ea92841f0fa71f3d9d850eea1d96f90bbede4ccaa2c5c75f5abd5df414. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CACIR1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee18ff37df1a239df9c50d9b11fcd299a53e426efbabaa6acdbdc517be895a0. 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/QZK6H2460692.