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 0xd42a32b19675847dc4715ef0e360ac5edcac3536d959126cf8c711c446ca53a1. 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/6f2a5398-c7c3-46c7-b7c0-758c99e7579c.json and https://artists.proofprofile.net/proofs/artist/6f2a5398-c7c3-46c7-b7c0-758c99e7579c.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 0xba28d3dc60b3ab47e101dc0b29dca4e9086bb4e0f500abeaa74ddd1e9e615a29. 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/USUM72212070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f29933392c6506cfdfbad20da9c8863834867c0a86b21fa13696ae2057dc37. 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/QM24S2306415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a080443b67a54aba4cd8d134433c686d010f707211b67a6a26f6290d5648252. 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/QM24S2306414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aa3d45ac7e80848fe32c3c94c0f699f8ded48a15d64dccd864a798e665fc1f. 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/QM24S2306412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af632ceaf6da53775441dc95cedd9d655e3b481b99e7a748a5dce6e969bcc83. 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/QM24S2306411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc925cc62864489500b5e01f4c85fc58a5659f650cda1ad67afef35353830df7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2306409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918b117ace14198fc225fc68e862830d01f01f47c58cc96826ae9e9ae85517b0. 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/QM24S2306408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba28d3dc60b3ab47e101dc0b29dca4e9086bb4e0f500abeaa74ddd1e9e615a29. 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/USUM72212070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77314fc1b76ccaced79a747170dab29403958a881ff780634247adf8ac7ca7ca. 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/USUM72300974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b0b6f322c75f4c605bfae24758ab1689e34be0d051d6047673dcd3ecce7bcb. 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/USUM72300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5774c8a8ecceb56582aa4b7608dbf61f8c49dd12a93824afd706752dc7115e0b. 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/USUM72300982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1fc2875b52fbbc7f2321145aef7a6d38a2d489a5ee2757da2fd42c47861ffa. 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/USUM72300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ee68fefacfc5d329f465079f50acab4021cd75ce74d5962899b99eb0e5861. 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/USUM72301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590c3c4dd4932cd6eb41c5ed6bd97b156bb9b752a8f97dc5d5864dab42303920. 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/USUM72301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec812a6e53df0c60fd0cb6415ac451d59af305c99bbee6586a1ad2f54eff484. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71814831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8275315ae1fb9b2907d76f3ad2d9ab06c27c3d4837111621da1c502069933. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71820053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4841c7181ffbc16ae8d0ff67756f0b53af4eb6c1ff4ee409fb006c0d71a3a5f2. 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/USUM71820057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561284623f4e57601b190a214f0baa86c5d27c217d16d8972f48822d608d4ca7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71820059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73a3b6ed53ac898d4dc869eb8206d871c9760d90239f501194fd437c3a52d71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71819434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2000248226adc0ee399139e9e3c4d553bd90291e9cb674a27b1b53b202d98531. 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/USUM71820056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a75fa11bb75568f1532e182a6f5baff2bb122f90a195cde96a224916c094d. 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/USUM71820060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde39dba51f3131d2684a3783ac7724e0712fbfe526f1d90bbe950e7d5040ce91. 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/USUM71820055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3483e8569e439821a53403c9d3ad055adb99ca8a96efa6b66863341b4cf19e7b. 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/USA2P1809178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cc0562a8b089a8d46913213c2c1e9f691cc9ea8312157952fe683ac4b36a77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1809179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73030f7d650eb3ebd9a7def1e4105c6049dd0dcff1930a393a0f5c9fc9075bec. 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/USA2P1809180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc792dd193ddcbc2dde6f4d396a172be198de9477ca00064df85415042a4bd483. 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/USA2P1809181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7022199ab1e374c45ede45add0a35a545d57f8567541b064b1e4bd66585a65. 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/USA2P1809182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82ce926c2bb0382e1623f7d72c5d9866658302884053d1343d19efb67cb57e3. 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/USA2P1809183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19d94e69ee75ddb395c95faa1346fa1019f2f9b34b97c68c3eadaa91bb03256. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P1809184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d134ec7bb1ff2052df8094cb70f0e0e6e8564eb65b737850bf894a2d8a9f0bc. 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/USA2P1809185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec812a6e53df0c60fd0cb6415ac451d59af305c99bbee6586a1ad2f54eff484. 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/USUM71814831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ae1b92a5dbeecfb438998f275b4c9e833458570bfe3b1cf7b629f123032bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWB12000465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ae1b92a5dbeecfb438998f275b4c9e833458570bfe3b1cf7b629f123032bd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWB12000465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9921160afc3691210d29251f012f3515bbf7a38f8ff47650da5d8ad1ba95e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1366151.