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 0xac7f201eee8ff10ce83854b710d2b5bc0b922a650d0d0861d55e2f7222834b59. 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/d0b0e12e-5293-4d50-91b6-27cd2d1b0edc.json and https://artists.proofprofile.net/proofs/artist/d0b0e12e-5293-4d50-91b6-27cd2d1b0edc.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 0xb3c12b27e95161f2799b17d794f43c587997dcd5cab6cf77b721284986db5d1f. 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/DKAXA9200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1706128ec929746b2c685233731fdad84b0922a15b2508a5a01a012686ed6. 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/DKAXA9200047.
Jeg Så Julemanden Kysse Mor (I Saw Mommy Kissing Santa Claus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210cde08b086ca102dbc6dc209062469f585a95f6b3bb22cacffb5e6477632eb. 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/DKAXA9200048.
Flower Power Tøj (Ding Dong Bama Lama Sing Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e0103ce5b09548094efad2c0e42a4e8c55875dc69ab5dce3e16df90d68bdfe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAXA9200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad6fb73f495c10d28b26fa4c254deb083ba0ccde05807ee796eab2d83f37302. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKAXA9200050.
Huis Tårer Var Guld (Om Tårar Vore Guld)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e94c609a5b5d26921a4be6a1817b481cbfd1b1f793fc6e1f06c8a13bef2cac. 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/DKAXA9200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e769a4ae815dffd8e93a9efbe88dd25ddf0c83500f80c0395980af66456464. 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/DKAXA9200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80653254298704544699083aef7cb677bab2273f359c50d05d3e9eea20736bc. 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/DKAXA9200053.
Jeg Ringer På Fredag (Jag Ringer På Fredag)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1e69d613218131b4e314d28891b4c1b0a9cab61a03a281752df001cf98f682. 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/DKAXA9200054.
Teddybjørnen Fredriksen (Teddybjørnen Ferdriksson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d3081ab92bb0646425a3fefafd2b395998f09e0abe12a022d80a8c7487bd37. 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/DKAXA9200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477c325dae2317eea65f70d1540e04b8e547fa4160f4be67f0e9a8b212629b82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAXA9200056.
Tag Med Ud Og Fisk (We're Gonna Go Fishin')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4311d07d514766844d903a2c531a951bf2148862526f096746f1cfb7b4abfa0b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DKAXA9200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68ae069e066beece1744b60271e1a8072ac4517ae4c66cca58b8d200d13d3ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAXA9200058.
Hvor Er Alle Drømmene Du Drømte (Vart Ar Alla Vackra Drömmar Vägen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfe244b44eb39f5e6ec23ac5aa7d93bc6d1af82f5da8645f91971e8e575dd45. 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/DKAXA9200059.
Søde Pi'er I Spanien (Auch In Luxenburg Gibts Schöne Mädchen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e2898ac04afb77dc0b1f42c8761c09d4f26bee4a42c9ca321a9c013a408a3. 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/DKAXA9200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a91864dbadc9b48846c1d8aa1481a8c017313666341030e6f150318db00a494. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAXA9200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb589a4eb9fc788525f0d4cd1463846efcf1fffba1f7f36d90a3d9be2b21f0cea. 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/DKAXA9200062.
Her Bor Jeg - Alle Tiders Bedste Børnesange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c73eb5a3566ba75b2c1cbd2c7a413eb58f06996a488d93be1e2bb79ddd8fd54. 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/DKADG0900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4e241a1934faafd2e4e799a3853ae36dcf2639f55a5c2a6e715d2e2e3085a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKADG1200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcda523c6b422e751f79132aea376a3a193bd34e6fdb96c3d3fe300a8f6696f. 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/DKAXA9487101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41121f654ea79328b8b70d5fe5fd565254f71928443f632023404fdec86d8118. 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/DKADG9802805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ac42ce53f9ac013a79eaaaee3c56a39169073e4635bb1edc1c2046d7a7766. 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/DKAXD9400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98009d5dd8c9c30ced502b7de49572383e4b575225df995dbb7659a19fc8d209. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DK4YA1002301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518bf47f087c979240c93a44e8998add45c05646a74b99a09729789e4107bad0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKADG9901803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d452c35b4f9b7209d49e895132cee627d1f9e174da27b33bd12eeccf501011b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAXG9300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe683e4d0e3b6f28b057d31056f58374c1faefffe5f59839a90832f1620770a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DK4YA1002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42fcddfdebaa2b60c2158e3082f149f2662bace7624aff143ae4f20f566a30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKADG9901809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71773b0ecc4c60780ef11445c13c2ad628428de0aea087f0f8e9fe0d9e26190c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKADG0800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40657d8e0e0b6f19a9ec769dc8b7cfbf68e12824edc8c17f93c6cf8007ac2f67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKADG8600213.