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 0x9461c8223695047743c040ea9b5d6fa615217e58e52e43668e637e3e13e0040b. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8e7c14a-3200-4ecf-a5d2-1e197b6a128b.json and https://artists.proofprofile.net/proofs/artist/a8e7c14a-3200-4ecf-a5d2-1e197b6a128b.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 0x04e10fe15f1217f8b18c87ecc413fa909b72c9b5409b7d9fef9c799c3fca96f3. 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/US57M2022001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae86fdad2be0616b6f3dc9b8813a22191c3e66392405ec0ea835e3d30c16eeb. 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/US57M2022003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e0471508f07b3294b2177d2c1a9b06f2d41739c90bd17b447f1242754af439. 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/US57M2022103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560611e8a8bf8c5197f08d1e075062e121fd44f0e1e1b394ed0342c509a19f15. 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/US57M2022104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c779669580515d5c7634c369a8ee1bf50992f7322357333a51d4201738d3ed. 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/US57M2022105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff9b6fc4e8b721627c534d5ac4607bc1d6aba8ce37f5a2ee46a25d6441ad820. 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/US57M2022006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45319a6968d3839b961f1d53847508f651a5a6d3a1eaaf96b0d1ddfce9ee7106. 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/US57M2022007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea948e9ac014f39692e297237704ce36237fc3c613cbe7aa173fdf8e0cf03a3. 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/US57M2022008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f59465230bc3c8e52eb98a7895d35769dcd62740ad86cf934c351cecb37de29. 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/US57M2022108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9de74e90b96d80c0fd039dc3c6debe925332b9d1787434375d1ef584e07aae. 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/US57M2022009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb6f8f301c3c3b138f292c76a87574e06f869c6bf0fa1aee8758c9508ce9b0. 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/US57M2022110.
Electronic Saviors - Industrial Music To Cure Cancer, Vol VI: Reflection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9878a433c0e3f4366adabfafcb88149734210432dcccc99535279eda651baa. 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/US57M2021640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b86611cf18916b690efa40f439f704bedfd0914f122ac42515b25be881aba6. 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/QZHN32263097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d581ffe0ad1b992eef39fb4b3159618b4a5d1553ee92d4d1d45aae2a7524af6. 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/QZHN32263103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce0c49ec7ecc99fbc118571cf930712a0844a613ba822c69ee28abbfbeb83ca. 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/US6UT2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d6e8736c256a13ea41c3c57050737e3a32ba797fab94f346b7026601a80a5. 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/US6UT2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2e93fd75711f2c9e5654b4c22d0ed9850a03ebfb44b292dc07a06f3b07389. 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/US6UT2400002.
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 0x93d97cbe2dcf80f021a9f212f5f5cb930761725447a559597f05f18f65c62862. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/US6UT2400005.
Musica Sin Fronteras (Remezclado por Klack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047053876d00f2d625a011d20252e6e477d17a20afba7bfcbf59bd1242fc2cd8. 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/US6UT2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd245d0f9b83102be55987c81a4c5559c2a0e93aff1ade328823ccc6fb31de. 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/US6UT2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1574d23993b600402d9f6195877a7728aa2c4730628be8dfd089a9539c1afa2. 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/US6UT1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c65926d5eb97e7a8b8eceba1a641aaaada79013c3b6cc40534107cc9c20844. 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/US6UT1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfa2f5eee48b714639a54bcdc2202c520df27d04474fffcca0031faa44ff53. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/US6UT1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6c179eb28fbdc9a090be6774f61876d63764945654cf88444095a165928fea. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US6UT1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613392a412da9cae08b23ad0871a87d39048662f6ba33229b9a7b5d3e99856f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2129502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f44d7a5bdc5b58ac1cb0a017fa115587c100184a6982ea72ef032782b0d472. 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/ISV982102601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a79eb51a1c28c6cdb90cd3bf49b80205d468a6de57c622e4c09f0395340c97. 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/ISV982102602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f00fe4b114e76b9aae49d509e8bd8e662208d3d781915197895f0f177a5eaa. 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/ISV982102603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e31036e593b058e211540fc76472dc55b7b97af4f5b2a322f77aa46db91fce. 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/ISV982102605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe409c0a15f32fd83afcde2c8376005a4ef3bee0ca9a109cd25b9be3a8bcac2be. 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/ISV982102607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22fe87d2c205325c5a14bbbdcf2c5517bc4dcc4b5b92e72e0cb1f19e9f28ebf. 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/ISV982102609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e0ace02cb21f756c949019c0bc10049dd60daf3f953db72c0f2d2ede184bb. 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/ISV982102611.
Who Controls The Past - Adrian Sherwood Electro Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581f817e6fbc30b8a12e7a018a5321716487b5ee1858ed46ef8588a2bddbf60d. 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/GBMJG2113979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f6f58bcca4539246da60c7385abf1caeba6cf641c291fca9dcf5d136a8e06c. 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/QZK6Q2204868.
Undustrial Records vs. Tigersquawk Records