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 0x48499dea54bb74de1d108b69c26f35fd630fd7273c70e0318aa669887c3edac9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4e01ee4-069b-4597-ad11-4b9f3554786c.json and https://artists.proofprofile.net/proofs/artist/f4e01ee4-069b-4597-ad11-4b9f3554786c.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 0x7e6130c5414d1e4cabb285ab43b2d85d9aa9667e69821c94da83a9af180e98e8. 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/QZS642361167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d491ccbfaa49ff51791a543279e3f89f0c26e09eb03e010b394b4e1b35f2117. 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/QZS652399563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6cb0c314bbb79a920166027842f16a26c99a9ea62249325a1c2ff51eeeff98. 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/QZS642358276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8971de3c6b5c4c07b227863df0e7dc17d0cb1da9a76db032c2be42e203d125a2. 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/QZMHN2313698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0119b87df47cbb16d1b106719be2baee8f4521568fafd78643b5cc09022e9671. 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/QZS652331608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4db15259627a33a9f222972b1d24afc3e2481093e4aa4c5a1349d44ee142655. 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/QZS632333395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bda99896e85de9279d3b3a50d219c43e56b39156ff390e7253fc051adf1fa5. 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/QZMHL2316205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4232c628b134d43d44c6749a51be4a2adf3cc25837590f2b08f0a3eb22b9e07b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZMHP2391964.
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 0x991e7002719ac47a149135996138b41b7e57daa46e1169884d67b66e4d51636a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZS652324070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d81301dfc7828ce9d829216b5d1d549bf8e5bc0149a73190870baa12d2cd4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZMHK2310408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb439ab79deb1cb56c9f5dbed48259f4eafca6fd7ad3a0f928b02667df7d60131. 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/QZS632399101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e57ea92a3be428128dc893c19f957610d3718acd887f2c9c9a91a4103915ce. 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/QZS642315976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d460f4b657b2993f66917b19fead6f0567d2959e54bdeded690a043bb8553d2. 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/QZS632352148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f668b2cee5e27b3ce9d00cacda197ae91a8fe8c03ed13d8344f83e0b347ae08. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZS652333399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171bc8777e57b7a4af2744bb8de72d2e79b18a64e8aa23056d6c4c4891029251. 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/QZS632363970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b635de5aac7030895d00a8f64ada4301aa3d3103e054d296f914c063a981c. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZS632386988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cf18b0040bb01c7c2fe1690aeb3aaaef38a5286bda214ba2aa129fc036c6f. 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/QZMHM2313917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fc8c6efdaadc57265eac264aef2e748dda1dcce9bc57392170e189daf2187. 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/QZS632332258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d1e34d14fc0e0588d79511de6f0298585611618395fbdc1942de2c9c1115b2. 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/QZS642394727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb57a20a0af4e3292c5b91058a99d44cc6cdff80fd1e52057d586c25a97a9b. 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/QZS632322507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214658aa08e682c239aafb1ec7c948d3994d270bee1c5295fdf5ec9f71dd157c. 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/QZMHM2350006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72009aaad75532b0c25761cc14d321133b1d78b2e110075b30e520ff84a86398. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZS632384084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d94510b54cfe2ae483b236d0fab2d46425e37f0926a04425c23b750446baed. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS632338645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc40dc7dfe096cea6a0eb69db82734a14c25edded01fe5f755e8a0b9fe693b1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZS652375541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e8dd08db8aeb5afd8515affbdfcc9124e332cb749970a18b81c786c4181b14. 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/QM42K2368725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ad7ff808f5f541c0310c641ed5a8624edcccbca7cdfdf30743f8a6037daa9. 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/QZMHM2386841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ed2fc32a5f44db96ce9fe17d489f06ac15d148e65778fd016dae51bbad9dab. 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/QZMHK2326077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5559bdc2d237b958c458067145e78f1760d2f1a3dc2466f088ed601b8ec279. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZMHK2346731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58c9d9dc05fe2ba53dfee52a23efdbafc8aefc64a71c80f0f1c41a2e769a2ef. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHK2390318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19567fbf04f481efd64df2f02ad51e7a73a838be77ae4483d3fa41d9a5a1015. 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/QZMHK2385052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7ebb159a9878ea4d225b08ef02f3d7521149d5c5173a9b6642a7fb010b8d8a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZMHN2375758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84dea458aaa2f1857564c9ef07c7ad365459fbaba05f994d428d9b77c370abf. 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/QZS652327548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f369596cef54758ac0f1dac87ce5a4faec02386c90b1c4ff208ba65a9ba2d5. 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/QZMHK2334810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954270d5ebb27b77370da9c0d287e2a2f308f16d067296c911eaa811fedb3999. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZS642304223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db83238143f66c01f3683e6f9174eaaa59e37e6e43d30acbc778da049074e3. 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/QZS652399214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa394d1a004bd37f3f80f6632a63783cfa90b59cc2569510c607d3f82eb5ed718. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHK2308813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abe72f6fdfb7fd2d02b9b7ce9ff0d8a58c8680ef2b0d345282e72bed8bad369. 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/QZMHM2364121.