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 0x4727c9577ecb0e53b404dd85d2c6aaf730ead60a8abb2668c24085a4676e2ace. 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/0b675068-15b7-4c79-914e-ca3e98b82e17.json and https://artists.proofprofile.net/proofs/artist/0b675068-15b7-4c79-914e-ca3e98b82e17.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 0x9486577ab0f547e830103a2fa6b5a176f2e670dd205b2f64e726eb31801320c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEY901400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa76a18513713c34075ca73f882e9764b65c8aebf65d34c7ce1f7b2e9d5a63. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEY901400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0f69c829416ceff57f52d0314085c0e471f86fd2664e1f44aa6b1fb03ca34a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BEY901400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb2487c10734cfe9e3e850d42ff606ca9a7b440b4f7306dd4890a9f27d5428b. 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/BEY901400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1c8167da62114423b2302961fc352ef9f738cd8cc6bd600db1939a58ffb9be. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BEY901500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef7ad00ac430bd4e31c6cd579708a4ca8b1b006734e3d6d43f61bcd3e65b77. 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/BEY901500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8491f471382c004d509b3664248a32c9359a820044a6e7e497b44c266a076c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BEY901500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd473a4f3b6c2039ea15fabc6a6d87749c887fe5904a583b5d18b57b611931. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BEY901500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026ee4fb91dedda3a29e643f69a4a9a1a7553e4054a603c5ecdef1b21f4d68c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEY901500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda75d03bf7475876281fde9ce2dab08d34d4dbc16d9e88992ed03496ab47cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BEY901500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd7b3d7220f5b76726b58e2296314cad0d991db7a3409f3355fe5c395ebef5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BEY901500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f4c1f087fe07473713b39d7cd4878e3d4eb54812bf3682ba78bf3492ae631. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BEY901500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811170e8b5d33ee58799de8f3d98c9092eea41c72be79b23fe469f35a659c093. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BEY901500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bd74143eee252b1e747cf3d2c9c514a4647514efcd7dd3fd8d097238047518. 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/BEY901500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2535aaaa73a9ba371055e00a5d14d1416860f66ddaae51b58401b2c8833582c0. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/BEY901600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908877796df1d8cbb7b861bf9dd3b7a3c716d19004c62adfb763a00c1202864c. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/BEY901600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd95ac60e42987c9d95ecc6c391bc4959870abb9177fc656a95ead1cb6b3e2dd. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BEY901600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa238a6fdbf5bbd1db15ed37d978724cdab6c488161f93e14d4e59518ea08ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEY901600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6f87d68ce7448b17232889a4a3ca2f6d0a62bb1a52df35e934ad0087d4ca5f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BEY901600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57576ba1b3d6421ccc6969a3095f2f1ef506f5ee637016e07e0c7170a6b8a0a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BEY901600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0373448fb1c0e14d166dcca73e4bf5e7f3dd4c1e6882e2003c97672186342c2. 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/BEY901600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c06fb0d4a42358f6e8667f5a0fcc161c689c9c2fa7890321c98a80f981131f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BEY901600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4718110db0ac2bd050a0293d20bf3ffa1cc1618161b7373bb2a6a0fee85785. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/BEY901600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084357df62bbb88f52087731a73849c949757e04e4732f196afc3f2e9eba623c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/BEY901600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643347f49faae717ec13601c0fa963f4bddb133237b0d8119536eb0ffd5cf244. 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/BEY901600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c7bc22d8aacdeb077dac51cf1cbae1319548de300971592907754eebd7a6e3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BEY901600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d6a0142a6b52c5d0670b3ba0d384024f8d12058ee01b12294cbe403a685aba. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEY901600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a238cd5eaeba133c1573ffbab6e18464f4320c38829e0b1bbcd8cb77eb5ca6. 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/BEY901700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dcf749f7991941edfbb0e6132653a4bc2bd661edad7b49eabf12322e9a45ff. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BEY901700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14ba1df4df3d443fef90f5f8f9cde06db94e8149c97491ec6114a7e9068187d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BEY901700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0b6e27eaafef08c16eca07da50696388fb9b6646d32086c0850b2834f1db7. 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/BEY901700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9bd9b09636d4ad8fbe31fe443d5ad036026055fe6627077d01c57d1e27910. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BEY901700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4125fac24a7710580c4690bac12aadad97734c9ca761af972392833690a77b7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BEY901700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2b0fa17540ca65829fc0b4eac164b32bb96a5b3265fd85189398cb7926a21d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BEY901700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd0b157c32c091d5b24a5b5a684401b53abc4915ac6f988b99074401ee6904e. 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/BEY901700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299ec57064f91cd7175392ba841fa81634b5f56f711eda33eaef1a97e4b9b982. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BEY901900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a9d5c068d7bcdb7615883a48fdc1eb436771fdbbda2ac02d65c096b84a0aa. 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/BEY901400087.