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 0xe6b2a0cfea03fb0856467886171040022ceb034bff30b29fc05b2555cb34200c. 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/e6845c17-d4e3-41c4-b1fb-8ffbd2ae7b5b.json and https://artists.proofprofile.net/proofs/artist/e6845c17-d4e3-41c4-b1fb-8ffbd2ae7b5b.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 0xed3f2b456f15907bec53f3631932429322a330d4b684ec34784200bb3aeb77c0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PHO010100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a282725436b87df259c7552980dfec2866b51c6089252dca523cead575fff6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PHO010100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee75769edc1a259f2ddc74b06fe8c499689a47ec9403184911faf2053493f3ad. 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/PHO010400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e5c901291c23566b6667bf01ae6a535644b98c82aa30ca9856f6339a1cc226. 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/PHO010100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c95fdcb16814dd09b235d1d75868b11cafaf63d588a4d6cc6ebef358a5578. 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/PHO010400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca051e1b0de529aa6f9298f703dfe3c1d28b026ce7aab7ad0379ca36163e4ea1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/PHO010400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b9da20ec7bc3199f6d8b4e8e1a320c0b9e9ef0e17787100b5ec257ee9dc8a8. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/PHO010400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbe89e50cd2027f73a3a5270a05796a332d429b3ffedb776b5240d58a4db40b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/PHO010400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2551cfb674a9b0932a7f2fd9a66781b71b64e53af972f725f0dd033bc815ee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PHO010100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3db1095f305aec7d8e9eb65b74b7b872cb4968ee7ec488242091b6003bb008. 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/PHO010400073.
Essential Classics, Vol. 97: Carroll Gibbons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90709715d8756b94b5899150649fb0327c003aba154473b82fe9cc133fd95f7. 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/ES31E2406022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90e406af19a49b42ae1b93aa2d44f42aa86e2624ca0e826cedb8a5d4583d62c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES31E2406030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c821c2c939bff29a061d9fa0bf81d69a54235fa2dbb20a98e4abebb0220f0fc. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/ES31E2406032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76a9b0947b7d5c6dc16f1f803abaef35cd34432e1a3096ffac4514a6e517f2. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ES31E2406040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d18e41ccf52e9e6232a105a59a7a5877c08993a93bff9e01dcd43a9a4c42b7e. 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/ES31E2406036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd083ef52d7bd940661a22e36d212e353b75ba54d113fefa26ad0910b17b58f03. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBGN38338301.
Take a Number from One to Ten - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab7c42940dc818b24494570698dc99cff5ebbd62f6adfaedd541a6d879fa553. 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/GBGN38338302.
If the Moon Turns Green - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a0a918ec6bb25a3475195861b4fb17c1a96b1fede8fe4072cd5d4c8bbdb84. 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/GBGN38338303.
Straight from the Shoulder (Right from the Heart) - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e3fe18e33ce4256e49bc7db48ee0eca8a66f99d2bbae6395ee5a54bfd42bbe. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/GBGN38338304.
You Turned Your Head / Other People's Babies - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2408219b82beea7fb498aed25764d00ced63fcc776c99029c33f4ac3d1d728. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBGN38338305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f3ca798751d8f59d03cd983ed1afd2297e334b8d32aa306a8b2e1060485259. 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/GBGN38338306.
What a Difference a Day Made - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6754581e62fa7c1c5aa7a917d45d4477d800d4e85c77010438d6748157dda0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBGN38338307.
Pardon My Southern Accent - Remastered 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5b05ab94a2fba0299b9cfe8610db64817c064b687e30c0cb9f9c240c188a0a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GBGN38338308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769170b5a3d2d202e3175c1471417db68900e4f49a28f11405ac6734eb265122. 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/GBGN38338309.