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 0xe30671bbe13abeb1364c8eb53c091259ed27776c67199f7477c5110acbb193ef. 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/c4a956bb-399d-4904-812f-8f2c67d5d2a1.json and https://artists.proofprofile.net/proofs/artist/c4a956bb-399d-4904-812f-8f2c67d5d2a1.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 0xff716917afe134249a7078ae2a40db3b93d1cfff7b85e2d4eeb1a833837c0fb0. 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/AUMEV2460096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b06ec63ca0a204d228467f0411aceced88244e0cdbda9a0c720b910fdb149. 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/QM5HH2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab0be0b141b435ec0819a46e717a36f1db2d923074f67e22d70e658f7c83e0b. 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/QM5HH2000036.
Ten Woodland Sketches, Op. 51: No. 1, To a Wild Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e1f040ee3cb7648e395871f63a803d8edca80b4ff77cfe6d85841716d173d7. 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/QM5HH2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8554d962e1c264e0e964286a82422351ebb220f90be6c1f4671be311ec486b1c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QM5HH2000041.
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 0xa84584d8e10af2d68a960b3a546156ff9d751f87bd249aeaee0867d7127f2279. 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/QM5HH1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1410eae7f98bd5f84eb5ae43d0b5ecdb727cdb6adbf10b5d807d118e09efa61. 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/QM5HH1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baddd72b084551c33b9cb1494aa35e2ba3eca69d2598e760b7ac7fcc8cddc41. 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/QM5HH1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f691bdcab42acc4ff4685c9623889cdef947192ab32ff6444399341df1e0cd5. 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/QM5HH1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce7cd0a9897690d67931caac5964d2d38166a9e10f685bd46a7373544412181. 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/QM5HH1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe997c173e44b4b45e1a72504bb140aa24af091128e18f9eb00eac5e1f7621fd2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM5HH1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d3fe8b2d3c59f89eadd4a74135c5f892f83cd2cbd85a0342d853a914c940f. 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/QM5HH1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e83c233fc41645b0bf68b9b32c2b4376409d1b3c848d36b47c89e389af1ee. 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/QM5HH1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc8179957058fa2502dacb880edfdf46a8b741dfc4332c008a5a249cfbc7a4a. 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/QM5HH1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4731a1948e15dbbdd5e36bd65635e5aafa5be837e63e929ee40a1e18fe7b297. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QM5HH1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25335e7b1ad708d63cc593c90d191ad9eba43de659c4eb2b51479dc69df3c255. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM5HH1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3dbfe66532139e2f82e0a6354958e20589b59025cdefe098ed2de460318a39. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM5HH1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ebaeb309f16d98320a1cd5f3e24d411b1591bf6e7ea0b35b6e7e9a7a74104d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM5HH1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacccbe90a516cb8cbe40f0cf000b163f5e90c4da277f8533d67ada588cc34cb. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QM5HH1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e027f183c6ee3101032704770fe234504135ab46ac3ac1683612443369706. 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/QM5HH1600002.
Music from the Wedge: From the Musical "Hapenny Magick"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20eaac9ca81b27492f13ddbb5414b85ff7282e814b01fbd535a06247d8604e1. 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/USCGJ1088774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122491f35b2331ee5128536fe2ba52ca9ce6f3ab7623fcf49cf8ef68f372996. 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/USCGJ1037597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e03abcdf37031a064a3c845b73ee71e9733bf20878021ae1de6a646e73b56a8. 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/USCGJ1037592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f66d3dd936d995f9c323c08f31e1df1798b364cddecb971f725bc7e06d2c0. 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/AUGBT2433099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446ab21c1a5e48015631b5afffd69e2cc62e704694b5285fb85c6365fd949fa9. 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/DEPI82402420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9699f7170d80d7405c45586325b5420de476f4b2a54b86f0957cdffb92c069. 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/AUKDT2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f048700cd41b9ddf5579b594b1c99d0c0fd3c224d0a5c28cb16163ea045ad0. 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/UKR6V2311005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5fe6c9d35bda97e86e484ac27dc9271fd5b8d7610db37f8f3e96c9587c80e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKR6V2311006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8ec58765ae053cc4e9c46863daa096461a3032ac2f031398f2e76c91771231. 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/UKR6V2310295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c757eeaca1213d5690ad1f854b2cfd08113433b688f47a6fae58adb82c9792. 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/UKR6V2214101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c76dff2d66a457c0dc2ad166e91b5c2c080881fc7c4f85cece2289ef03a3bf8. 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/DEPI82211265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6829d4ebe1485f96e2b168008463c094ad93cb13d5f1e67ba8324e0858ba26b3. 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/AUMEV2242550.