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 0x26df035e23406c46acdd5e4e4425fffccf3c2949ff0d92fedd02da2b9a902901. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9553d10-33ee-4500-85c4-c01e3635428c.json and https://artists.proofprofile.net/proofs/artist/a9553d10-33ee-4500-85c4-c01e3635428c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lakmé / Flower Duet: Dôme épais le jasmin ... Sous le dôme épais
Delibes: Lakmé / Flower Duet: Dôme épais le jasmin ... Sous le dôme épais
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 0x96f995780cd139efe53a8589f1fb0b439e21f4c0075176ddaef20b9f938de658. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN962432309.
Don Pasquale: Quel guardo il cavaliere ... So anch'io la virtù magica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20187b7d09ed563232c94309a8c6aeca6ce54d75b8148c6b0ab27b7172345b0d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962432301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418832822e8576c902a56c0dc79b0d913966167e4434967ed2bc5a60dd7c31da. 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/DEN962432306.
Norma: Deh! Con te, con te il prendi ... Mira, o norma ... Si, fino all'ore estreme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cf1267fd7058eb7165b70d1eeb7f36015173063662be0a95380535224e6b2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962432307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f995780cd139efe53a8589f1fb0b439e21f4c0075176ddaef20b9f938de658. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962432309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ec2ee5ce965ab1562f8bc889c56116f4909b1fd7ee2ce9eac906f15d915877. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T19:02:34Z), 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/DEN962432310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05137ceadd0fb32e69e4efba259b53441caff2bace716945b8af07cc532608a1. 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/DEN962432313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218eaedf51f1e109bc363c32aeaa6d1a9736e5d224e8e7177e81d142f1a68e3f. 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/DEN962432316.
Elisabetta, regina d'Inghilterra: Non bastan quelle lagrime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9251ecf80dbe1291ca72a75bb9f54eceee6de8869ff50b4ff6fc9c1f6f0a92. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEN962432303.
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
Lakmé / Flower Duet: Viens, Mallika, les lianes en fleurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c887858731ce7d219ac9098bde086171ce855ec6339794cf417758ed5935b7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEN962432308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8837de9fd66f2855dfd6ed541992dadb06ccfbfbd6c686f19c1fdfdf3e10bf4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:01Z), 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/DEN962432318.
Over the Rainbow - From "The Wizard of Oz"
Arlen: Over the Rainbow (From "The Wizard of Oz")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168845f7a73a5ecc3c728d15740f6d21e78488546d3b8d64b237be11cbe4425e. 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/DEN962432320.
La fille du régiment: Chacun les sait, chacun le dit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce85721c1d405f62c3219fd4247b512fcc1a55392422326231092f78845bf1b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962432302.
La sonnambula: Oh! Se una volta sola ... Ah! Non credea mirarti ... Ah! Non giunge uman pensiero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc592374eb39a0609335793eea4471e04d9b172c79e42c18c3f90718c29c2119. 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/DEN962432304.
La traviata: E strano! E strano! ... Ah fors'è lui ... Follie! Follie! Delirio vano è questo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19baf0a08cdd2a5ada200829af84487bea0f617de05220c797fa49e1f1545f63. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEN962432305.
Les contes d'Hoffmann, Op. 67: Les oiseaux dans la charmille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11b800fa703312e43490dbda3cfb1af06c0316a699bdf5228f5ff5438236ce5. 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/DEN962432311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd4a01b292b27a9a116934ad2007dd709577e0df1162d5ab1e819c94e6e5f3b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEN962432312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03b09bdc608f6da8aa2cd024af334d79ce46f7dcbeea0384d17e382f25e5a17. 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/DEN962432314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b32bd803a15876078ea159e1a27cef8cfbf9bee092443718c5c111c4a72e7. 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/DEN962432315.
Moon River - From "Breakfast at Tiffany's"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e00abbe020d9569a7ded516a4510b196b61180187326766e6999a0dfaf6ac. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEN962432317.