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 0x2efc53f268e75ae883711b13932607e3658add4a871b11bd6e813a21858ce78c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4939f117-2eea-4201-b564-1c817333c2d5.json and https://artists.proofprofile.net/proofs/artist/4939f117-2eea-4201-b564-1c817333c2d5.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 0x2863a0df35c3faad085f058680fef6b0c77328895cbf60dd94bccd247e455d9a. 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/INM251110445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe345e92aca47f620244b9b75c91584b2a53c6ff1e5c197396499d526d8615e2c. 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/INM251110416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24876bff5e763e5a6a8fbb87143b25a3a85c9b6476d9112d283c7e8c4ae73160. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INM251110420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49796c6f03176c6798b1bf0d332572c45c0ba517d65799f71558693f5e9dc3a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/INM251110417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfd65b6bcca635a70472a8a3b9b5273c7abdc5de91f5980d738192041a75af1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INM251110388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea9412e2be940fdd7d2dd46c4f2498b118856992f199af0d792ee4f5c78ce0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INM251118020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ac9c9691eeea0b7120e9ed44903b3d166017ddb9cada6b0fec5f0c47587eb6. 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/INM251118022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8172eff3b7970d5cb6630767a9f46a3c09fb7aa77f64ae2a921d41a8cad69a64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INM251118028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8dddcf7f39728cc8931804b9f05d16611f26c656c292df7f4029235c32bcf7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INM251118029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0f522b8e8870753e2c7997d698dc456eea62650b1fcf31aa275cf43e2588a9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INM251118030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefe3e793415d8afb149e35e80a6092cc7564b43ebb21f8547ef66c7d698d0f8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INM251118036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4b10641fa110a2d6480259afdbd31855b5c010b542088794bcaea128373d9. 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/INE130501178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581dd1d517f760c77323b7f6d47f8a433c7ba61f5519a0b64dc4221ee269c4c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:53Z), 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/INE130501180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb330013ec74106d436f89cc095060b2f2813f5c7ad1bed5f1057aef61d7af7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/INE130501182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d59e7100391d89b9ca5a408038717bc13b27790020273b3bc5c4c509e089df6. 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/INE130501184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1544bc1e4420592053bf24139bbce00ed5117c883cc0921db2081b413cec2a13. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/INE130501185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcda339cd3c664d627e0ae3fe2aeb6d71664731901a2954bffa8c4458940a1d. 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/INE130701253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f87d53a112b488013e7ef770a93a3e2159230d1e8ce6513f678a957c9c4d1. 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/INE130701254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e28e9f2faff33d8a590d6020cc4ffd92facb04ed5ec7a247b2efab453eae4. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/INE130701255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb756ee2ea472c5e25c07edf637b03a6377f898c0d2cea7feb13cae83cab5888d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/INE130701257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd112db3ec4e65f5cdca41a6f0281c2871348024799e955647ff92d2430d09867. 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/INE130701259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8426a94155bdfc0aff7f09d42eafcc1a11363a366bdc0ca69c61e820c9dee5a1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INE130701266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2763b2d734cd6075733abdec6d5c79cc83a823a6a506174304b0018929764029. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INE130701271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebe4c8682eb4e6b24644eacf8eb384d90cf65695db02641a35fb73ba3a434a9. 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/INE130701273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d57aac115b9d39cd4ca5d03ce7449af4ba1c5d37f542c501432143460b8ce6. 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/INE130401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf41cd82171519197c57409ae9d33cfe0a195b232da353c4ea9e64469651818d. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ING212495057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ef08a6625c1ff81dfd5069b0d183d730424826aad190b7049cec17928d5c1. 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/FR96X2551000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c267257454c34462698043ef84dfcadbe438f4e2d97a72d10e21a988033ce6. 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/INE130701263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c04af3555c120caa96b7b1241958c682bc26362a7b01691305a7813f3c97c9a. 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/INE130701261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4cdeceb0bc0cd4bd904df158f3cee157cbbaa7e31addda9ef01be61ee9ea4. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/INE130701262.
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 0x95c1f1f356d62c2ed8f201e9691b3a4db8dba459c24a74e30938ea4ac0ac7e50. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/AEA0E0006496.