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 0xde9ca7b6b7c406d5c4375874a2605bbe8a6c5b0d25d9529587fb3a7eed16dce3. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc4f545b-4813-468b-8dee-d09e268e0d0d.json and https://artists.proofprofile.net/proofs/artist/fc4f545b-4813-468b-8dee-d09e268e0d0d.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 0xe294b899fa2033820db7e15f921d6bbef8d2348bc8b0e7be9fb5d2418d6bb18f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM22147789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c712aab9dc4a13f01a241d612e36e4a95fb83a3bd1db822c90a0574069382. 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/USHM22147790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287be4c3f8fbd696454a9a6981f32b9fcb60037c62c7f596bf0e043b0bf51fa. 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/USHM22147792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3f08c9dbb62c5dd835b31e6b66953622feadf7b95fc43e099bb12f7a00a42. 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/USHM22147793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a9112d06407becb6eb86cc0334175c7692bf8f97b83b58301a727d7fb93a75. 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/USHM22147797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a933e73ef43fef4ec6e162e35eba41e5035d0869095a1ec80c0a323c229b3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM22147791.
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 0x208289111c21593c9889aeb14be56033857c03e76bd2b5f845595cda8cc7c953. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM22147794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b92e0b7d73990a08fd3d46c36a93ef62586a2dac85ac6673faf8fff3379690. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM22147795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56efca38469175976b24888910be3522bb5423b22deb82f6ea3bc96dc4ad8a40. 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/USHM22147796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ce8e312f4799a23d1a8f7ba9bdacb3a83cd3f9295311aeb1659bb00e33d09. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22147798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224e5db313ce0369b42a3be6751858a2cc03a05b5ff5b36a9de450e03c1c90c8. 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/USKO10201295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca36d7dbcb66a2972da61da2df68ebd330b0f53adecc12eb2c68392e3e32826. 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/USKO10201298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2028608f932cf455dd1facf9a5a1958e5c65d18fdea64e11f9ff1b8ec08cdb9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USKO10201299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23f36a98341d47e98e221ce9c4bdb14ae8097e38f87ccee61db70e370bbc53c. 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/USKO10201300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7d95c932fa1f26bea32a335267831facb2e27740e857c77e7383b81bc4aff. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USKO10201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab92e398084ed7d196a574f960a222fdf02ce0a110e08aca304ba63c2d5f73. 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/USKO10201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecd4b7e81b30a6a4249c3a609c257547250073f3c950107e7f932541e3d9a06. 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/USKO10201304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d62b4abcd98c1e7cf4a8ceeec30ec709e1bdeb81a2fafc4083c7153c949ee8. 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/USKO10201305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c1eb2c7ed674425c97162696c4ad13271a76dc9b243175ea6d3089da488ae. 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/USKO10201306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd112416ead39fb4c0f1191418d8000b59ac447e25575db05ebb3f1882e8963. 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/USKO10201308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227f53d5aab564e0055d72325802f1bace498c8599229baf085ea9d494c7a764. 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/USKO10201309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a2a28989b2f6d2c3fad087c7f2c3e3ecfee31635754c554bad072e6cbfb9d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USKO10201294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b096d802071ef7a748b0c011e73bf2ae69b9c87e5f74500e4ec11dc2cffaae9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USKO10201296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80368f0f618f0b8e6d495fc493e67ddf28629b159c5b1278f06e3db870e95a8. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USKO10201297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f372257c43988cd1a1c6ffe443d2a97aabaedeb0836e6f338589cd1c978771. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USKO10201303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35139ce6eaa86f35285bc1f0e45f06c669443e5a7ffc39612949c743bcaa60. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USKO10201307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565c7a0b393c8fda50c0d1d21a6a6c235070f06e9fbcdb0a8f073d2ad65d723. 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/USKO10201310.