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 0x8ed4befebf9086f0401323ccb0d91141ea33545fae59f0952e871f698b2b7b1b. 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/f87af0b0-ac9e-4c90-98e9-676d14aa0927.json and https://artists.proofprofile.net/proofs/artist/f87af0b0-ac9e-4c90-98e9-676d14aa0927.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 0xbf603eed8c1a38b1bce35428b3f24c8a9d3e90fdb44bb70abb3f0f476d00e80a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEI1971291.
Did You Call Me Last Night (Acoustic Version)
an Anecdote of Love and All that Lies Within
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73c72eabdfbdb7223b9266695eecbe2ee16acfa5f963e4becae2b5a10088e7e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA52290229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e262023393d61903e317f15f4f477331e8918a26dc084b922de6f14f29add09. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA72287726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470b2c079f986c27ab65e1169ea067999c2a9dde46692c26f442cac614cf06be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB42242549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f80abd70ca0d25d45829dbc1fc2fa3be5495054b35d750123f1dff1c03a25. 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/QZK6F2231293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4da457c4082d2192e09de70903f6f7f770af011f7ce5141ef0281dfc2d1dab. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTB32288252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827a98779b81350c2dda43df30ca8501e7490427c562605e45daf9dfc37bb29. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTB42242551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54325653bf6ae41d60b89c03ba4153f29228813e0be9224091013291a0a8f525. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB42227513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ab5d075ed439aeb6b1d0b57cf8cece0929465af8e4ecf5b75b8dc2dc65e1f. 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/QZNWZ2287524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec11810b51d340f03a0ce55035b37321c3221a4adffbbd0c00262a2fcb2a65. 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/USA5W2300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632bba7490a4931595d54a5774c36021558f4af58053cc6ac6c7d8670956a6fc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA82461037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cefe8c5b4e1730411e606ecaf56f2ae3ac79ae2ddc181927ef3d5b3bb5da169. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32481277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02238ed1dcdcb24d71c704ad6a998f7dea8c5f43149b806d3e96a4a100993804. 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/QZDA42455416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c70cdf1a137602f0293a133d079345042dfd675514a2934d94fafb3afb0679. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZK6M2490790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec489b756d706cbb8a8ff1d5b5efba160f3b610098f35818e288324971f0dbe5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6G2406215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e239fb2c621a518a548cbe08c60d8bee60e23aedbd9cdc89d3ee0d57a00b48. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6F2448351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8c9bfaf75e60d449ded50ee41ac6eb78eba9c029391efad29f78126e3ab979. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTAX2487566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79d02ea97992eebd5e065143bf40933e5cd8cd004159e43e03741f7ce71f188. 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/QZTB62410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08d674a1c862571ba09d7367cfd8b615d69a53b15d08284d5e50ee3bf6c73fe. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTBC2496537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c2386c0e7d6c5d67bc1bff181d137e2721a83418009ed93a24718cefd49cd. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZWFJ2430698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca252b490c7cb3789e9c3be858064eb2c1734244c3c1056fcf40bbed3ab91232. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZWFS2449804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ded039ed072b7c3a5f20d59ec55491dcc2e6920270ad6dfdfab9841ebde2b4c. 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/QZZ7M2418561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277cdd5d001d86ba5b0bf57f6c1e2cd028de27ce909e94e5bdcf13848d755c3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ22582356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e446cf0e6eb40abfe61d067162bed0b1f61ea35171c8e5b1b510f87585c1238. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA62526245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e239fb2c621a518a548cbe08c60d8bee60e23aedbd9cdc89d3ee0d57a00b48. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6F2448351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca252b490c7cb3789e9c3be858064eb2c1734244c3c1056fcf40bbed3ab91232. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZWFS2449804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266752807ea5994c5e7308d87665f5401bcf009209ad5621b3f43bef01221f0e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAT2411717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79d02ea97992eebd5e065143bf40933e5cd8cd004159e43e03741f7ce71f188. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB62410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef8bd2c00c98200ff4c9d1abe5473407cee9598987726c296eb7137375a4bb. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZWFL2459860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13e7f5be70993d02123f0e5adf0302cf93ca76e32b8cc7554c674adf84cd5b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWT2414874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08d674a1c862571ba09d7367cfd8b615d69a53b15d08284d5e50ee3bf6c73fe. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTBC2496537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66851ad677d14174f9db44d2e9c483812873a90ed28846221f1e060c3c23b4e0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZDA62526246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277cdd5d001d86ba5b0bf57f6c1e2cd028de27ce909e94e5bdcf13848d755c3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFZ22582356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8c9bfaf75e60d449ded50ee41ac6eb78eba9c029391efad29f78126e3ab979. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTAX2487566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27cb131207f5c4e10400140ef1d7833cb491aadd2e032bc26bacf9e884b3e4e. 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/QZTB92488922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ded039ed072b7c3a5f20d59ec55491dcc2e6920270ad6dfdfab9841ebde2b4c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7M2418561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56428209420e31c558a8eff08edbb71231c0ac1377f3e0042efddf01caaf713e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFP2531694.