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 0xa9a0e6de3439fa5c173ab6273b6bf6743775fe15ff710705249427cb8bad5de4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/656e4197-d1e8-4658-b791-0b6c2c8fac7c.json and https://artists.proofprofile.net/proofs/artist/656e4197-d1e8-4658-b791-0b6c2c8fac7c.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 0xaec4300e13631a5b7f923079f86b88545cc98c96749e90c73683bc2d00a6d395. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA71973926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b59a345cb35b89dbf3c7ba11033134ac4b6f3c6178592fd5fd186a2bdcf494. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZDA61946179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad3305730d7540cc44361ed540c1510cfe3a3a096d95aac6933ac3bd1d75abc. 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/QZES81927268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119b4643c3023653dcbc3fedce0c83cc4fbe1ccf33a47184125be48d6e43015c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:21Z), 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/QZFZ41910673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951b7414bc4c054f31c4c8219be07ba8e8383e2d877ba9e0b7f23375ecf3165. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZDA72048172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0199a8b029ddb1a21dd1b0e819cf0ef9083edaf654e6fd942f1b04323a556dc7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA82073529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86bac1339cd97ea9483d5a20ba6cdd961fd70ebbc8c2a86f1a83ee1ee83404. 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/TCADR1803979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456be94cca53f2c3c74c020fabd63c5139daf4baefd5f48a942786d788ac7d1f. 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/QZES91868553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4300e13631a5b7f923079f86b88545cc98c96749e90c73683bc2d00a6d395. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA71973926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16941ad47f50270d7a85c8bf760ffa13bac7dcf871edf9c98d7ce94ba88dc914. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ8LD1927379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0cd8e0a6a02b47bcebb64f720f6cc191b4c0159085c053d44b87e6da95b363. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN31902472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad3305730d7540cc44361ed540c1510cfe3a3a096d95aac6933ac3bd1d75abc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES81927268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951b7414bc4c054f31c4c8219be07ba8e8383e2d877ba9e0b7f23375ecf3165. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA72048172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0199a8b029ddb1a21dd1b0e819cf0ef9083edaf654e6fd942f1b04323a556dc7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA82073529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b08f0685c6b17e252a6ed0d4fd84912df1b16c20ef850eb1cbdc0562d29f81. 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/QZES92011449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c7f67a11c568db1a675a3fab3f6a0959c90efdfdfe09445c4ceae233671ae. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHN92048865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91e3e12f6b84da8f549ad413cb393717b64d14955b8d44d589869a348fbbe67. 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/QZHN42028553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b08f0685c6b17e252a6ed0d4fd84912df1b16c20ef850eb1cbdc0562d29f81. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES92011449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80efc7c1676bbf4cee1fd7c3af6feb2f008dce8dd5eb2f82e877b73a789e943b. 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/QZHN92048873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b219ae6b8f2514241106ae58559b62cd7b7f6e7498c3e99d2a5a69d8be99744. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES92132552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e045eb523bb63698b79e6f602625037f61c8e1653d2fb7ae26685ed3b62cb0. 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/TCAFP2190003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50752347cc0aec16ca332442d004476ac1cc965daf48e2603e4b1366ef7c353. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNWT2196358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48900684a26897fa8f8540fbb2af7e873769dbeec69d36b046da9f01f70aae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6K2104048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b219ae6b8f2514241106ae58559b62cd7b7f6e7498c3e99d2a5a69d8be99744. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZES92132552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1998531ea91dca438ca238e07165db76f4ffe6964c8556ffb34aeb24072b91b6. 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/QZDA42186531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297560d30ebe340f9e3b61bb1ba9e02e168c3a53baee443508e339ae151ae367. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN82381044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08313de225b12b9f8bcb9a8e730dcd2afe221006ca7dd7fd4bdd5f7a1fe9cc26. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UKW3Z2302564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39e4aad4bc88f1d428c0fa972a9588c595f28356f9d43eb81e3235f3a0eb7d. 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/QZHN72053803.