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 0xa5af4406701812dbdf11dd95f49a9a3d130073180ced9bfa4ead76198977ed42. 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/4e85b8e4-fb7e-44c0-9f4a-6879e7bc9123.json and https://artists.proofprofile.net/proofs/artist/4e85b8e4-fb7e-44c0-9f4a-6879e7bc9123.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 0x96e88124468951e47cb5d0af51a8b74ff02a7800611f1e255baf7d47f9a26f23. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/ES5950702512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a4a1f99ec04a74b8d7f30d7b24e6519bbd7c6ce1618fe6f1b5abda48332bc4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/ES5950702516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff8c961c4335cc25a9a0bef4b0d34aaf8cf296f63403b84cfbb466b7576391. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5950702517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5357f30fdd819c11d76eaebfaa3a441169bd7865e623838a937f329f4e3f0977. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/ES5950702491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a97b39964e69df6f371dba8497e07b87a4e37913563641cd0f1ccb8aca372ae. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES5950702496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21a095236dee80f2568a4d5613eebaac8e992c99fcb3628e56f9d560b21ab01. 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/ES5950702504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca61f9885d8943a2ce2cc19a87cddd7c1a64b4fd67b209a8e65d0382f6db665. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:26Z), 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/ES5950702505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4663447de78e3a51b6d341c5304e1054c669582f3e93c9e957238ed34f167372. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5950702525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8fb16f1f338d859f2bc6d6fca11e586612cbc14adcdf061e188b61637e8bf. 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/ES5950702526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c9d7fbc6d4cdac349c13a60c6c00558822f018deeffee282895f934fa0daa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5950702567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5682dd24686a48f5fa82c9b72713edec171f1ad55363ce038e14c0efbc4824d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:52:31Z), 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/ES5950702568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8507e7497cb619b32d7e3bbce53007d81844f8cc6e55882b66f69dd5d30495. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/ES5950802779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fdc668ccc649ac0a4eaa3a24ef4e8b19b58197d8e7d8dd6d8bcabdb10b5d65. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:21Z), 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/ES5950802781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0863872261e0cff3be31ef46ac9196049808d68983b52ef2ded3ab7133c9dee7. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:13Z), 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/ES5531007688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b420d29e36000e42961ffc2d3a057c7e06d29ded7c3d150d26c088fae16d77. 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/ES5531007577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3737e3ee21417a6a8e7a7982c649786217c8936da9202aafec69ba779c31be. 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/ES5531007584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa9f91af7383c1cb5022c5dfa171b2bd823ced2bf446c9ad1e5476a7cd285a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5531007576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f15e12d064df935a17687badfdd6116c29891956a5c3baed3245d82b499ecf5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES5531007667.
Petites i Boniques Cançons Per a Infants
Petites I Boniques Cançons Per a Infants
Un Llibre de Cançons Per a Petites I Petits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db81d4ca07c11b647ff320f119d83ac9092fa43f18f93d447c7226475f40645. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES17D2101347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899bf321cf345eeff9a608bdc3e3d9a4cf3eff943b04fd9711fb5a02a4157d5f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ES17D2101358.