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 0xb69071ab993ff72b75d59c3d9ca935b225418355faaf86f22893ac94539010eb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2875b68-d2a1-423e-8f9f-f3aeadd71fa6.json and https://artists.proofprofile.net/proofs/artist/d2875b68-d2a1-423e-8f9f-f3aeadd71fa6.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 0xba2700c2cbe3bc9ca0f5061c4758d4275245e81ac6444870814552b30b02e4b3. 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/HUA611802829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0eff96ce5b2b5749289051c1b38a5e8598bd4fc060329eafae42c54e5b8ec. 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/HUA611802842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6e2799a485dff86c44c5ec227c40ad31916d6233dabf49685c39b78c31a264. 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/HUA611802843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec0090616ba8b0c9e035c37f6559943178de00c5d745c165cd47b4656f230d8. 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/HUA611802831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f28dc9b0a2cf600f1146a645d7a954f1f81fb8cbfc2bd8f3653696e0ea7fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:36:06Z), 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/HUA611802835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a45262ef0a8e2396812c40596029456ed5ff271d0c3fb3afb01e89a50069a7. 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/HUA611802849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92448f7e1c670e94dbb1572b36b4b1fd7edf41b520959fa427d158ae6f70794. 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/HUA611802836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167ed997f70514c4cfd1ea2bf53be3f63a4efa6f05707a3fffb165d11e1de6c. 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/HUA611802837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff13c76b54fae06ff60d94182f28ba23fea61340b914fc1328f47d13138a89. 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/HUA611802838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e53af1481aad6ff63c95b6f13627d4e2eff855d3634d57161b7c0ea2dc1dcdf. 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/HUA611802839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781ff5055b8154cbdbafa02a72d932660cb43336bf5660cf7c3492a0c72dcbd. 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/HUA612303992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6330534cabd674cb25dba10a26446d6cf8a78e3b5fb02830b98cd9135ba6febd. 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/HUUM72200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b38e04a24330567c599a0b84ddbc8697d8f685c4bca6e618cee273b458ce3f. 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/HUA612404344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94b9c64ba85cd5af4b5b36755988188b3327774e2313102b8da540b7a595c0d. 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/HUA612404345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac5ca7000ac83a15da734157a5103366d43a85bd48439dca5a84419b457f3e. 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/HUUM72200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e352dd3350580b1cfc82f24d8e114968286b6cafc431384608d086d3fe41a2. 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/HUA612404346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33696302410341dd159d1f234f2bd7af9051f87ef5611d4ddd28c4fb3a64071e. 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/HUA612404347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1c2cf10d00100d3121201cafe8971c94e2dd91a25ed336b01a5c66eab570ff. 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/HUUM72200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a76de615cc2ef78c6bfe5ef9054c15af021d4d7d6778bb739722f0a2279526. 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/HUUM72200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11812d1ef3d428275f499ab7d2c326bd3270551ef91f1853f05e050c899f745. 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/HUA612404348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a62d1d6dacb4bc3e4182a777b469aa36e356aaa75d349e5532af2006d8ed3. 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/HUUM72100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9960c3e919ee2392d5eae0f1f18ee2277c9e6397773628e820c8a01ffbf2c9. 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/HUUM72100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c67e31f6e14d4efa2a8ddc434e74893827f2e8c8e9dcd610af39a8570935034. 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/HUUM72100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff658c09222a96355bb3ab909589cb5214ac52af66d4c460f84a85a37f9dc6. 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/HUUM72100627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c8473905202c42c51f344a31557309d9fc309a4d15421c5ca44e304f961f1. 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/HUUM72100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e58684eae5ec6a2b00b4c90cb06d8818d9bb00a89ac5ed7f25b127bccaad71. 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/HUUM72100631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dfecd6644c26aa2e9675dc2b7358aa586a7e6a2dc662bad43071a1fb393f89. 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/HUUM72100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea70f1591206c4f8e2d90d292f4885e8888a4f085d2a8c744c81061d5cbd414a. 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/HUUM72100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f50901bf0c54757cfd2a8513851e9d17d3d2188c07f468ca27c5f7fd93930f8. 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/HUUM72100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8133b5bc42f6e56c7da2894b80ab25b915d0b2387621c38bb007973b66439. 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/ATR981322934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e35997bb4fa6707a38aad8e375694e87dc9c10382ba07dcc38f7c653e8179. 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/HUA612402148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7893c366e702b2992081dc1d86f7227ab5b439bd729cdba5114dcf62cc8698d9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/HUA612302595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8052098659b603cbbecd32a46bfd2d360879f8aad481d59d999e0e7886ae981d. 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/ATR981323085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd429c53d3e50b2532b5cfb6940a76d51d26c1440ecaee59b125202c1dc4d5042. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ATR981323086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7818a7492a9375d367282200ae3db31b3fa02a65f3d07f425be2dd426fb60c. 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/ATR981323087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4531cfe7213daebb98cd00011a354f4459bfda2f005bfbe7a8d376d491487664. 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/ATR981323088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e5d6819561ed013371629cc9b53f1ee73c5d04c7fb3e42b315d00d893ae9e. 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/HUA612304314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75937f4744433c91bb84e8e6c8c2dbba8174f21fc13450f55c26533c1e0424ca. 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/ATR981323089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b520f480ef49049d2202c744a4f2fa7a28495e0431087e2b248040012469951. 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/ATR981323090.