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 0xcd892b38b1f510a7e6355dc32d2476c58686bf6f3afc00136ec03604d4abed25. 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/2e508a94-74da-4914-a932-7fc8fa93ec9e.json and https://artists.proofprofile.net/proofs/artist/2e508a94-74da-4914-a932-7fc8fa93ec9e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c78a639e25a1d44fa7c20c2e31f6940814d0cc6d91ef8c2be0e491fca088434. 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/ARF412400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c152d4e2839d5d8c3841eaf3d22e95aa092cb3551d1570de9c6af26d9c018a. 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/ARF411300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682fe2927b54ce52c038e916091609ceace9a9685eba1fd8c67e99bff2e01fe. 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/ARF412300205.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013adad787678d330991d6411b36f0cc6b7b96a2b1f918dee7318c3dd4fe96bd. 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/ARF411800068.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76526d94125be4079fed1e36e323e0b4bb34d23d014aa0ed968bfad9613defdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARF412000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f47740308352a6ab68af612b7e30bb34b6f09e20eff0753cef420270e0f23a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ARF411800239.
Vintage Reggae Café - the Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c152d4e2839d5d8c3841eaf3d22e95aa092cb3551d1570de9c6af26d9c018a. 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/ARF411300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acd2b81be4a569f57c8bb3332bf2ba9fcbe5c090360eaa2be5246f9ff66c467. 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/ARF411401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6818ddcbb7d1a2862bd817e3abec214b714be91ab5523668f8024f6641ca2d44. 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/ARF411500978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5e06ac8c9aa3be04a8fbc5ac60e4cbec2f27b155451c0d5977e806e225e51. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ARF412200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3428dc0b85e76394606879d8d143b7ef1d3094598c35e811d6702bbfb360de2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARF411701238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c152d4e2839d5d8c3841eaf3d22e95aa092cb3551d1570de9c6af26d9c018a. 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/ARF411300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5e06ac8c9aa3be04a8fbc5ac60e4cbec2f27b155451c0d5977e806e225e51. 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/ARF412200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acd2b81be4a569f57c8bb3332bf2ba9fcbe5c090360eaa2be5246f9ff66c467. 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/ARF411401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d7b992b9d0689c3882f3acde61c5504f42f6e725922c1bcae52ae62ac2c450. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF411600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a03fbc981df639d7cbea3271072176657a62e15fdde80fb5ce208ac4c4b3e. 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/ARF411701808.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0024c0f89d3b2a954eb1034286317c58619af22971e0d49772f45a5f68e83a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ARF411900362.
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