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 0x107746ad327bb7d29279f65784a143025075a0126c4c2008b99bf4d8d7a48dff. 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/e6fff249-d0e0-44ef-8392-e29dee2bc989.json and https://artists.proofprofile.net/proofs/artist/e6fff249-d0e0-44ef-8392-e29dee2bc989.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 0xf5fea921d72617c8743e6eb1981bc3631f1a3df8dea3cc541d67d504b9081c83. 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/BR02M0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9776db90440cd44e6a2569cc0cacabe307977d6d13866df0ab2c637a8dc9b1a. 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/BR02M0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59762657aa9b82640db80c9e3c9d0242b1f73d062d88e8165a98d99d1b1b5d42. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BR02M0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8960850602fa4bb240a30d9040db9afa80e8838ca6bed5a18a4880d52a1a912. 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/BR02M0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7278ca4f0db63d5e7451291a1a3d05b73ffba925666616131a6fac9e7d2c8. 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/BR02M0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ede688159f84c232206914306065f40df0d90cab7028071f78ab263357bbfee. 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/BR02M0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e4868689871c4a4665db199e1d3391ce3ea0bf07ba44638392dcd622e9ef7. 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/BRSEP0400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682313428b2f56c5e648dd0f145968f3dfee6b9686214ad3fc9b755aaad8b5b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BRSEP0400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308ed1b623895f0176810472fe478cc8ab57844b87de0e490fa34ee16522d9fd. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/BRSEP0400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cad1119e8d43d11957264c9f8e7338c91f95a2a83f7b3cd6544958ee0c54c. 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/BRSEP0400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae020399458f473ab92a606deb9603890f63db0e8be4535a3a03d8700f5541c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/BRSEP0400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d8f46b370a341d8ebc61df85dcbf7ec96d420f991653871bf46cb200b053a9. 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/BRSEP0400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14da4729c831ab25c9b88f726e442a466d9790d2f5aa9731883718bdba6d227c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRAGL0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fc18a7939b2e1bb3b6ae1eada024b60e1428d9ea3fd9408280cae2ed5ae05. 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/BRAGL0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4025efc03f68f03c98d4ee9d7ed4b0b5686cb51f2ff1c55c9a6102c16a0f07b3. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BRAGL0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63459db5a7a1367fc9057290892e3c48d9526faa1ca5db982fc891e0800e22e4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BRAGL0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c0502cf83440729b070e923f65e9fcdec00849a5b17237a3c43f1edbc1620c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRAGL0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061652552ab959afda1595fd36e55555ea0365cdf7cdfb0ed7b06fd63dc5dd59. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRAGL0900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27999bb7012eae284f18fa486c0c5a9a05237b85e3630bee59e85971fd4fc72b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR02M1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401f6dcc2022769940d3bf5c21a05ddf7f6be9e0151916dff38b7ed458e5ec4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BR02M1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b3220d8ee397c84436cf9e01302a4efa6ec5823e6298b19b01ce8617d954d1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BR02M1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb028cae333c45b79e3b60f68511e8e59a4084ae63bcdae5c4f0cacac37d6e. 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/BR02M1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644544d4778289122e78c72ea67f7ef6baef8aba39f57e5b4cb5c0678b0a10b. 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/BR02M1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb31d41e4a17cfa0bd32ce7473869bbaf7fc8780648752ea9a2abc5bd513666. 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/BR02M1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3469e813ced5a2638fdc43c9db07852ec009667f616810b0bf25010502058ee2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BR02M1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ee88c2f54b87032d6f14bec4f9371521a1d7fa10c6fafd7b1edb489d3d28e1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BR02M1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5489a96f3988b70816ee0377fea2264c264cb97739c7640df3b92c5dfced37b2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BR02M1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd6924e0d798ba7c65edcc50877093397b7b54a648ee3e9a3a4ae2c8a728f63. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/BRSOD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed2ec9c32dd08b33aeb44fcbc15608b1982552e75c20415ac435bfd4ffc41fc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BRSOD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121f08ab362f8629e7ba06485721e97df6dd09bedef46d3fd9c7cf1dda1c2779. 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/BRSOD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8debba21045c6e1fd816dcd74cfebaae27e48edc19f797dbb0873ce8bdbf9736. 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/BRSOD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696991c833dfbbfae1937aa609d80f0c2e03e1b5722baeb161dca73649d19c03. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/BRSOD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77f09190c8fda177c17ec0be7b84207f998277301aa84fb2dcc2186da46614b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRSOD2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7021ac49fee4ca612b565dd26932e3ad0c1e17146d8a27646933e090cac9b02. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRSOD2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ccbe058195c025f8f78da44d3a168c17849070af538a629f9df1b8392db370. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBCLQ0700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871a543b7776815a29ed39824f7a92769485d924b5b54b43ab698b18fc4ba21e. 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/GBCLQ0601147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59823ac61c3864067cd32bdd5738ee86544b545d71fed02f1b5d8e403ae0a0d. 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/BXQC22000004.