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 0x8bcf80b1e1e0b23cb940fdf2d97aca2a5d7f0ad0c5f6d2c16944b3a8c30e2af1. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/043497bb-4922-4bf9-8b7a-761c52ad023b.json and https://artists.proofprofile.net/proofs/artist/043497bb-4922-4bf9-8b7a-761c52ad023b.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 0x5f94db44e20ef230243b684b92c9b141c5b6d9c7ecdb057b2e80df6e6624941b. 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/SEVSZ8100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2294065554d7916568b8e9e51d8de851e4e82e08965ebca689b6e778a33616. 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/SEVGD9900518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe099bf22f8814afe09b05c2bb9ef729f38de41f77461883efd496a624cec05ee. 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/SEVSZ7000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdeba6fcc3e48c04d3409b02d4056b9ae5d3bb2fb973f7bd97657bc204230a. 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/SEVSZ7200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82dbc2f3a17d474267f73792c74cd447c06928aa277a73ca3b53bd4035d26a7. 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/SEVSZ7300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbeec78d6d582b8c41663605bdb2d9d426cfb5ac6c01bb35c70fb0e1263d14b. 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/SE4A41500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc2f990520797eb906cbc99c028dcb1f2705e4058cb94fdf57a2cb17cf9155c. 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/SEVSZ7100202.
The Best Things in Life Are Free/Crazy Rhythm/Cheek to Cheek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e6478ff200997e45d8e41cd08dbd9c2353a2a77ea6082b9163acdcfbd4f3d5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEVSZ8200101.
Tangomedley: Skänk Mig Ditt Hjärta Maria/Poema/Du Gamle Måne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931d8d8022e6ec699d5c723151d67a6fe4e4c1491ea2510c58064e1688b4f4ca. 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/SEVSZ8200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b229a2b1d3671edfda08621468bb8fc6df8cab0844288d3fe295d68580333. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SEVSZ8200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13ad667b86a06260668cd7768e8a42203884598a5f0f47db0b792ca5ed10808. 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/SEVSZ8200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb0151e767c2bfa9dc7f13803b59cd4d1f6ac4b58c990f8e5317c57a4f1c67d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVSZ8200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011a17831dff3408aabd5980943bc2f7c7c0f10d829c635d84063d7e7af03468. 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/SEVSZ8200106.
Sambamedley: Min vår är din vår/Det är kvinnan bakom allt/Jag blir så glad när solen skiner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5947baa32408c7bdd24e770afc214de2b964625cecc7579a2f9357ecb3782. 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/SEVSZ8200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003bb1f8c824560defd557811f486b39e918179344613c69043dbe59696404be. 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/SEVSZ8200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5612c3c5d80b3fd71a44d6ba9645891b2beca8d1f6a9f6cb2ae57f79854e86. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEVSZ8200109.
Rumbamedley: Carioca/Amapola/South American Way
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259ee4edb566ac77b7ac44e118818063a51d16077c3805f7b003cd29c3fad46. 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/SEVSZ8200110.
Valsmedley: Let Me Call You Sweetheart/It´s a Sin to Tell a Lie/When I Grow Too Old to Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b258ec4914cb7e5aabdddc1eb8569970db7376977645b2a7c3046d7568817d4. 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/SEVSZ8200111.
Beguinmedley: Come Closer to Me/Let Me Love You Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865488440a6ae8d2e89de701b3f21ba162cca93158eb87992c69b4eb3f3710d1. 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/SEVSZ8200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3712cdfe7f00c434c0ff7113e27e5df25e05238a9590ceec3c08df64a3ceea. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVSZ8200113.
When You´re Smiling/Bye, Bye Blackbird/I´m Looking over a Four Leave Clover/Music, Music, Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297802af5378ef7888f3aeba45ed1d65c4988daf733744d20a09555586338678. 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/SEVSZ8200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0162224195b033d344db9fc1331de5df5e93fb73b7d80d1206bd8ac61247b0b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEVSZ8101001.
Tangomedley: At The Balalaika/ Tango Illusion/ Du svarte zigenare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9ec5305aad3a793772575a4919f7f086eb52ffbdc63a9805b6b8b833cca856. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEVSZ8101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31358aab61612f08f30376390ec18a707f9ce261b6f1a935a097ba244e8548a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/SEVSZ8101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dba71058bf0ad0f3ef30331a7bab4038457bed7f84d66fc902688b8830dcdf. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/SEVSZ8400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a790a9cf35fdc22f5b2e896f45f0a3f7598b6d69c6fdad06d4cec8d12d9e7f3. 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/SEVSZ8400309.
Lasse Dahlqvist valser: Brännö brygga / Här dansar kustens glada kavaljerer / Oh Boy oh boy oh boy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3191fb0f72e045d8888dacd4833fa7c286c6d08193bf75214a79d93ec0da32a2. 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/SEVSZ8400313.