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 0x28b5fc47af547c05048508d95ed304e2cb77d8ec06dc113cfb1059567ca27c9c. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98a90a47-5676-4a2f-9a34-297ab0c94c36.json and https://artists.proofprofile.net/proofs/artist/98a90a47-5676-4a2f-9a34-297ab0c94c36.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 0x46bb0d7bc832bc50d5c13dc403c76d0b36ca8abd627f4933293c9ab959a79cfc. 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/USHM21874634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4e5bb81156837a452e2d5f3288e9f9ba93fc08b36446fdfaa4afb1190fa8fe. 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/USHM21874636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0dad04b14d9677b788e95d06a608e86878fc795c09dd6f8739276f6c6108a. 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/USHM21874638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272acc7a304e81788d68b6a49e0280ff5f83135663c8dfe949e526f928531ff1. 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/USHM21874575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a490aee83c607fd991db907c246d97a223dab67ce0ca15e18d02721d10f2187. 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/USHM21874576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3f79bda22ce512fdddaf29c171291e7e5a63e47fde60e77b8e58767f94d404. 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/USHM21874577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49ff5f12bd18788b6244fc0ec59fe9b582961ae587ce8bfa72be599f2fe45c. 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/USHM21874578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195bb590e1da7f4ac882a00858f79c7b9b7fc4f5f87a156f5398d655e8a6a2f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM21874580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d11b0eaf95b0f8336633dbccd8441917e38d5721767cde5a331efd657796e75. 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/USHM21874582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2c4b32805142b8394b220dca326554f764a7d6e1e5e13fe5738811cebc832. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM21874574.
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 0xf3162721d2cc743ae45d5024b37df5a97c1f4dd972af11c808f33213a649fc74. 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/USL4Q1953552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5151206bca9113d99a47c79a9b350b872a2664c4b91797b048aa0742e53835c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4Q1953553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afeee88d4e80b6834083474511ba19b4cbdfa1ef91014216184a8e44517b64. 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/USL4Q1953551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985deb86aa646a53fa1bf3b3b3312c1ad92408737b98687d5a63f52161a83bc0. 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/MX1041100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82635b93b438620877fd205e71564d5df1f8a5a41fd891d683b18ac670f21c4. 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/MX1041100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209279cbc6e4f114f9cd62eaf1f4b8c2d0b4b85388d373668873df9a207744c0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/MX1041100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b0a33ad1c5e10f11329595f52eba7f67c84085bf9262668685a8f38997a36d. 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/MX1041100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4db6c2e82e4a2a4d3e88240ef22246b81fdce6a5178cf1f14319fc8b929971. 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/MX1041100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ef9f5cf353ce72db4d105e5720b47d8207a2051073075726235a6500230b5. 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/MX1041100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f97bdf5f299cbfda7e77bcff41144ba897e6b8124b4f8052b7a0fd5c4fd4bf. 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/MX1041100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d604269da9dea20451e9402d0ed6da2daf10dc0cbc50bacfb04af19dd1f59. 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/MX1041100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c5d6d381394b714e4edff366b7f402c463a93d216bf32fcc4e5e5f35c0ff48. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/MX1041100116.
Labrador 100 - A Complete History of Popular Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c428bc64370d49c566167f61e1bd82d7a02b9dd6c45e1debbef2ab2a6d93e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVMM0206009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf1af65dce3a232d4b100cfa8ac3b47180d0621dcc9a9bf7f8a064ecd2a5b1. 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/SEVMM0002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2c3fbb86c273ecc08697fc43baa6f287d6bbe025a2d4d63d4df6de93c5059c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVMM0206004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ba43a05380731195027abef4177acc2f751b56e0ad1ee3dd0b1eaaf3b964e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVMM0206002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a18696009aaf9173bc45474007c89efc4161c31d1df8e01eb87bf62a20e79. 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/DEH420311103.
Man from Lafonda (Remixed by Paul Barman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a005d2a82c9c392f1b2e8c773b460e35948e39a173a2f6638910a7aef8fa314. 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/DEH420411501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385393541003752e8f53a173a40b17e1aee426a35972c0286c4ab1a6387a3a1d. 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/DEH420210303.