right|thumb|Grace Kelly portrayed Tracy Samantha Lord in the 1956 American romantic comedy musical film High Society. Kelly is pictured with Louis Armstrong on the film set.right|thumb|American Sama
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 0x71e1ce920d59087f0995647135e68b65d0a6896afc295054747a8de61fd74166. 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/8c833240-9146-412a-bfdb-db58b5eac0ff.json and https://artists.proofprofile.net/proofs/artist/8c833240-9146-412a-bfdb-db58b5eac0ff.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 0xb9bfc0367013529759f48d9de202e9a96762ccaa1e3d6b3c266c1409b7b55cc3. 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/QM4TW2020740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb5f6f262d423f332f819cfbcf291b896955983770ae81528604f1d2f8586d3. 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/ES5682000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd061ea8316172e352097c6a55920d4669cbc510f77dd88b0b98c85b1eec64b1. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/ES5702001944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d87d76110409d66aa7e2e475bdb55393f2ff4b0fe2fd9bd344666d666a870a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES5702002144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dfbcde1a7cf3363fef36f776e3222cfc922708a4af237552ad4f7177ff94ea. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES5702002143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf6e8582921e001116e19c7290aaf54224239143dd25bd29484c078ea6581e5. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/ES5702002140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05a636c7671e2c093346f8b365df9c9628f8aea83641bff8f960476ec1bb14. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ES5702002142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef235a1ed9eca5fa33d4f76403a00898c3d458cb7ca91888bf62cdf07eaf330d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ES5702100929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd2439377db9386ac0292b812308a83f1f8dfb2adc15eca934fb7f5317276d0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ES5702101695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db9f78e90fa2b93c74f0e5d1e8f11422e40c1f581a56c24becad58e4d710de9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ES5702102300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a954e57f7f004289839023e4abfc3a3d26cae5f7ade619a360c64eb62339b7. 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/ES5952106543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c43069646546058eda5ba3a23a9eddef8d45bd28000e2ceee9a1d28f6db4b. 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/ES5702200640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9dbf3fa4ba3db3119a0701c0e0108f20aae52ff7d7dc4b8d3035d643bf849e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES5702201332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d5fa1d4c996d3af761b8ddd65918d7d8ed392c6fa8d808f4925c69338ac3c6. 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/ESUM72300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d902a6adb61bc57496328298894e4f441dcda103f727da85fae12a8678ebef. 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/ESUM72301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd408f29f5a37a3e2e3c1dfe2c306f630d616738b5a374a26a12a6b6873d84. 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/ESUM72301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd2439377db9386ac0292b812308a83f1f8dfb2adc15eca934fb7f5317276d0. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/ES5702101695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca0c9d316e8dd4d9f71033d8d7b72279b38fe10d1b24ffd75b1c1f7f16999e. 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/ESUM72301309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4411e8c89ce71082f57f7db6894edf772ec5ce2ef72ced4e60f288fcbdbdac. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/ESUM72301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db9f78e90fa2b93c74f0e5d1e8f11422e40c1f581a56c24becad58e4d710de9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES5702102300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d5fa1d4c996d3af761b8ddd65918d7d8ed392c6fa8d808f4925c69338ac3c6. 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/ESUM72300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a8e6ce574758e9fc41d5ae4e9749a672bb75dafdfc9e3085f00b6f9cb621d2. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ESUM72301310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bd408f29f5a37a3e2e3c1dfe2c306f630d616738b5a374a26a12a6b6873d84. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ESUM72301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef235a1ed9eca5fa33d4f76403a00898c3d458cb7ca91888bf62cdf07eaf330d. 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/ES5702100929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bfc0367013529759f48d9de202e9a96762ccaa1e3d6b3c266c1409b7b55cc3. 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/QM4TW2020740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939ff6825e05e3ede5c2a778af50e8cb307b8530d5815671d84c68a8ca5148dc. 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/ES5682000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eee63800caeded4b1620b9478913521604a0f93b2ed1c4e3462f708e976359. 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/ES5682000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7a3d0acb7344f8f41a61bbc16dc46459f02409e7a63017e5e2724f748208d5. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ES5682000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fcc421af8ee2ec271c4cfb7d65e54d336afd4536d6ed87c87e10df202d00d7. 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/ES5682000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb5f6f262d423f332f819cfbcf291b896955983770ae81528604f1d2f8586d3. 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/ES5682000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52501ac48148867904f629d1e06011be620693bce1fe984a5f2768c52e2de93b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5682000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7205e36031b6fabdcac242f57ce0b03883f8415b67d0f760ec0a12598d8536. 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/ES5682000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db05107e9d77dcefa90d051de1689b46be8ff1524fefc42a5b4ad96d514fe71. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES5682000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedaa276e6a698bbd696a1591d02e1435ae52a78b1200a9f36d393da05fa3f6e. 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/ES5682000309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadfb5f454b64dd889a8cd1d69d72c658ecb920f665aaef25f17437eb644158c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES5682000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fef68b8ba617ce097969378d030ba5248c76dda80c9003ec339491da6e3d3d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5682000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eabcae5ee0753930690d538038e2e483bcbc48449bdd99643932d7476d443a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5682000111.