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 0xf43b6180f9f66f13bd62276590c05bec96724c758e9b9c4474dd3cddac97ac33. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65de52b2-93ae-4a7b-86a2-01882cf9dc13.json and https://artists.proofprofile.net/proofs/artist/65de52b2-93ae-4a7b-86a2-01882cf9dc13.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 0xef84c64fef35d85f13f8b5be1e996809db19c03aa4e097b2e544fc596864933a. 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/BRVSN0300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98132638329660a12d59a5e31f281d58d68581cb7db865ec066fb2af31293a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRVSN0300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc3724a18bade8a7583d57875948fd5984911529c989c18661b44a593f4dd2a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BRVSN0300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812b452e6f74a061c8a65d95aaf471a2e97405b71779c1334feff477fae7376. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRVSN0300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b89905a906d4ead85bf7c1ebdf50e12d93b9c00f79808e560e6e543ce5c4f. 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/BRVSN0300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced92af513f4bc2fa0bb4996c2178276a630c1ae3f8b5c91d99728c2aeedfa22. 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/BRVSN0300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc524b538d050e973a0b6920c4d789cf1c0662ce865acb4bfffdb01cc4c8b24. 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/BRVSN0300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1339dc831d33dacb1709de192184794fd4278675a784fd59e09b15ec2edb3f. 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/BRVSN0300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e165ffd9c9104a76e6673eef655bbcc8b6ec6ef947740d5efa861bbd15677. 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/BRVSN0300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f6e7f5b535d5f0324bfd05e42b4eeaad52e6fea6b33b75e0e2adebe03b0ec. 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/BRVSN2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c01c4c1c29fb79e51958aae6edb50d09772177847015d8924a302413a8dd8. 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/BRVSN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b37451cc76124f60bd7e4182893653755f0d75d93865d98a85ccc5779b6e52c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME1305477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7be132388c1a1d80441806c268c25fdf98d8a42d4eaeb2b1f416f9223ce1f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFME1305478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706b697051f0310977cc3d1ab54eb8684b23019f956f9287fc4d4d3ddb40d593. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMFME1305479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbc2d1db0f93811d32f72400032f1962a2df602d53b5b176057c7fc7fb75f43. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMFME1305480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceec31c396d56018d16330c075ad9fc6dbe6d5666c62fcd6cd8d5e6f692db2e1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMFME1305481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d8f3587a55cc6b0e70d8e1657b9bdb58a44865daf8158623b96890cb1e1dc5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMFME1305482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d6e05bd033c4778e0a4a722489918520e0cb4db90fd207481290f4299bdd76. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QMFME1305483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2feec17d3746c64de6235d13f0f8d9478974156ece309a5a97e0b131997051c. 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/QMFME1305484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b2e64128a1272eed196b4fba3172662ac61325d01149b764c0947ffb7ab311. 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/QMFME1305485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc745a2ab3a49ac5adbd7f827d9fb89743c1e708b9acffb7f0efc39758c0fda43. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMFME1305486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352f04333339e8007b767c4b799c89abcb5d936de459726489b2ba7f7e47bf0b. 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/BRVSN0500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e22bcf803bb7819953ba0e31b571f509c691c0880c510b35a5395e03ae52d9b. 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/BRVSN0500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7204e391a96e566af892da821a6bc9485ad401515556732b5b4ae68e0a6d1a44. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/BRVSN0500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef808626dd3527c47d0306db44bb61a59b1a7f203646800a67dcd3f45ebfd1b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRVSN0500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8370008e55e2de852ed847c0150289de27b007fdb5acc70367fdba171081405. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/US7VG1452505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70050c4d96efc39a9f5d5084dc71efed005c7cd3c2ce26c3ed6c432810636470. 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/US7VG1452510.